{"product_id":"bkwat-e400-ecg-ppg-smartwatch","title":"BKWAT E400 ECG \u0026 PPG Smartwatch with IP68 Water Resistance","description":"\u003cp\u003eThe BKWAT E400 brings ECG and PPG heart tracking to a 1.39-inch HD touchscreen in a polished metal-alloy case. Take an ECG reading whenever you like, from your wrist or with the included chest strap and chest patch. Follow your heart rate, blood oxygen, temperature and sleep day and night, and see everything in the H Band app. No subscription needed.\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0603\/0291\/7770\/files\/bkwat-e400-ecg-ppg-smartwatch-1.jpg?v=1793676655\" alt=\"BKWAT E400 ECG smartwatch with health tracking watch face and leather strap\" loading=\"lazy\" style=\"width:100%;max-width:790px;height:auto;\"\u003e\u003c\/p\u003e\n\u003ch2\u003eECG and heart tracking\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eOn-demand ECG:\u003c\/strong\u003e press and hold the ECG button on the watch, or tap Start Test in the app. Your ECG recording is ready in about 30 seconds and can be replayed in the app.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAutomatic heart rate:\u003c\/strong\u003e ECG + PPG sensors record your heart rate every 30 minutes.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHRV insights:\u003c\/strong\u003e the H Band app shows heart rate variability and a Lorenz scatter plot, so you can see how your heart rhythm changes over time.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0603\/0291\/7770\/files\/bkwat-e400-ecg-ppg-smartwatch-2.jpg?v=1793676656\" alt=\"E400 ECG and PPG sensors on the back of the watch with heart rate chart in the app\" loading=\"lazy\" style=\"width:100%;max-width:790px;height:auto;\"\u003e\u003c\/p\u003e\n\u003ch3\u003eFour ways to take an ECG\u003c\/h3\u003e\n\u003cp\u003eThe E400 comes with an ECG holder, a chest strap and a chest patch, so you can choose the way that suits the moment.\u003c\/p\u003e\n\u003col\u003e\n\u003cli\u003e\n\u003cstrong\u003eWrist:\u003c\/strong\u003e wear the watch as usual and press and hold the ECG button.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHandheld:\u003c\/strong\u003e take the watch off its strap, snap it into the ECG holder and hold it with both hands.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eChest strap:\u003c\/strong\u003e attach the ECG holder to the front of the elastic chest strap and wear it snugly on your chest, close to the skin but not so tight that it is uncomfortable.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eChest patch:\u003c\/strong\u003e place the watch in the chest patch holder, then stick the patch firmly on your skin.\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0603\/0291\/7770\/files\/bkwat-e400-ecg-ppg-smartwatch-3.jpg?v=1793676656\" alt=\"Four ways to wear the E400 for ECG: wrist, handheld, chest strap and chest patch\" loading=\"lazy\" style=\"width:100%;max-width:790px;height:auto;\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0603\/0291\/7770\/files\/bkwat-e400-ecg-ppg-smartwatch-4.jpg?v=1793676655\" alt=\"Taking an ECG on the wrist with the E400\" loading=\"lazy\" style=\"width:100%;max-width:790px;height:auto;\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0603\/0291\/7770\/files\/bkwat-e400-ecg-ppg-smartwatch-5.jpg?v=1793676655\" alt=\"Handheld ECG mode with the E400 in the ECG holder\" loading=\"lazy\" style=\"width:100%;max-width:790px;height:auto;\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0603\/0291\/7770\/files\/bkwat-e400-ecg-ppg-smartwatch-6.jpg?v=1793676655\" alt=\"Chest strap ECG mode with the E400\" loading=\"lazy\" style=\"width:100%;max-width:790px;height:auto;\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0603\/0291\/7770\/files\/bkwat-e400-ecg-ppg-smartwatch-7.jpg?v=1793676655\" alt=\"Chest patch ECG mode with the E400\" loading=\"lazy\" style=\"width:100%;max-width:790px;height:auto;\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0603\/0291\/7770\/files\/bkwat-e400-ecg-ppg-smartwatch-8.jpg?v=1793676655\" alt=\"How to fit the E400 into the chest patch holder and chest strap\" loading=\"lazy\" style=\"width:100%;max-width:790px;height:auto;\"\u003e\u003c\/p\u003e\n\u003ch2\u003eEveryday health tracking\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eBlood oxygen (SpO₂), with a gentle vibration if a reading is low\u003c\/li\u003e\n\u003cli\u003eBody and skin temperature trends\u003c\/li\u003e\n\u003cli\u003eBlood pressure, for daily reference\u003c\/li\u003e\n\u003cli\u003eSleep tracking, with heart rate and blood oxygen recorded through the night\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0603\/0291\/7770\/files\/bkwat-e400-ecg-ppg-smartwatch-9.jpg?v=1793676656\" alt=\"E400 body and skin temperature tracking in the H Band app\" loading=\"lazy\" style=\"width:100%;max-width:790px;height:auto;\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0603\/0291\/7770\/files\/bkwat-e400-ecg-ppg-smartwatch-10.jpg?v=1793676656\" alt=\"E400 sleep tracking with deep and light sleep in the app\" loading=\"lazy\" style=\"width:100%;max-width:790px;height:auto;\"\u003e\u003c\/p\u003e\n\u003ch2\u003eSport and activity\u003c\/h2\u003e\n\u003cp\u003eTrack steps, distance and calories, and choose a sport mode for running, cycling, ball games and more. With the app open, your phone’s GPS records your route.\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0603\/0291\/7770\/files\/bkwat-e400-ecg-ppg-smartwatch-11.jpg?v=1793676656\" alt=\"E400 outdoor workout with route recorded through the phone\" loading=\"lazy\" style=\"width:100%;max-width:790px;height:auto;\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0603\/0291\/7770\/files\/bkwat-e400-ecg-ppg-smartwatch-12.jpg?v=1793676655\" alt=\"E400 sport modes and step count in the H Band app\" loading=\"lazy\" style=\"width:100%;max-width:790px;height:auto;\"\u003e\u003c\/p\u003e\n\u003ch2\u003eDisplay and design\u003c\/h2\u003e\n\u003cp\u003eA 1.39-inch 360 × 360 HD touchscreen sits under scratch-resistant tempered glass. The borderless design flows into a carefully polished case. Choose round or square, in black, blue, red or brown.\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0603\/0291\/7770\/files\/bkwat-e400-ecg-ppg-smartwatch-13.jpg?v=1793676656\" alt=\"Inside the E400: tempered glass, display, sensors and case\" loading=\"lazy\" style=\"width:100%;max-width:790px;height:auto;\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0603\/0291\/7770\/files\/bkwat-e400-ecg-ppg-smartwatch-14.jpg?v=1793676656\" alt=\"E400 smartwatch with brown leather strap on the wrist\" loading=\"lazy\" style=\"width:100%;max-width:790px;height:auto;\"\u003e\u003c\/p\u003e\n\u003ch2\u003eSmart features for every day\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eCall alerts with answer and reject\u003c\/li\u003e\n\u003cli\u003eMessage notifications, raise to view\u003c\/li\u003e\n\u003cli\u003eMusic control, find my phone, shake to take a photo\u003c\/li\u003e\n\u003cli\u003eAlarm, countdown, sedentary and drink-water reminders\u003c\/li\u003e\n\u003cli\u003eWeather, plus custom and online watch faces\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0603\/0291\/7770\/files\/bkwat-e400-ecg-ppg-smartwatch-15.jpg?v=1793676656\" alt=\"E400 call and message notifications on the watch\" loading=\"lazy\" style=\"width:100%;max-width:790px;height:auto;\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0603\/0291\/7770\/files\/bkwat-e400-ecg-ppg-smartwatch-16.jpg?v=1793676656\" alt=\"Custom and online watch faces for the E400 in the app\" loading=\"lazy\" style=\"width:100%;max-width:790px;height:auto;\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0603\/0291\/7770\/files\/bkwat-e400-ecg-ppg-smartwatch-17.jpg?v=1793676656\" alt=\"E400 smart features: alarm, reminders, find phone and more\" loading=\"lazy\" style=\"width:100%;max-width:790px;height:auto;\"\u003e\u003c\/p\u003e\n\u003ch2\u003eBattery and water resistance\u003c\/h2\u003e\n\u003cp\u003eThe 280mAh battery lasts 4–7 days in typical use and up to 30 days on standby, and charges magnetically in about 3 hours. The E400 is rated IP68 for daily life: hand washing, rain and splashes. Not for hot showers or saunas.\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0603\/0291\/7770\/files\/bkwat-e400-ecg-ppg-smartwatch-18.jpg?v=1793676656\" alt=\"E400 battery: 280mAh, 4 to 7 days typical use, 30 days standby\" loading=\"lazy\" style=\"width:100%;max-width:790px;height:auto;\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0603\/0291\/7770\/files\/bkwat-e400-ecg-ppg-smartwatch-19.jpg?v=1793676657\" alt=\"E400 IP68 water resistance for daily life\" loading=\"lazy\" style=\"width:100%;max-width:790px;height:auto;\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cem\u003eECG, blood pressure, blood oxygen and other readings are for general wellness reference only and are not intended to diagnose or treat any condition.\u003c\/em\u003e\u003c\/p\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003ctable class=\"bkwat-spec-table\" style=\"width:100%;border-collapse:collapse;\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\u003cth colspan=\"2\" scope=\"colgroup\" style=\"text-align:left;background:#f5f5f5;\"\u003eOverview\u003c\/th\u003e\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\" style=\"text-align:left;width:38%;\"\u003eModel\u003c\/th\u003e\n\u003ctd\u003eE400\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\" style=\"text-align:left;width:38%;\"\u003eDisplay\u003c\/th\u003e\n\u003ctd\u003e1.39-inch touchscreen, 360 × 360\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\" style=\"text-align:left;width:38%;\"\u003eSubscription\u003c\/th\u003e\n\u003ctd\u003eNone. All features are free in the app\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\u003cth colspan=\"2\" scope=\"colgroup\" style=\"text-align:left;background:#f5f5f5;\"\u003eHealth \u0026amp; activity\u003c\/th\u003e\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\" style=\"text-align:left;width:38%;\"\u003eHealth tracking\u003c\/th\u003e\n\u003ctd\u003eECG (wrist, handheld, chest strap or chest patch), PPG heart rate, HRV, blood oxygen (SpO₂), body and skin temperature, blood pressure (for daily reference), sleep\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\" style=\"text-align:left;width:38%;\"\u003eActivity tracking\u003c\/th\u003e\n\u003ctd\u003eSteps, distance, calories, multiple sport modes; route recording with your phone’s GPS\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\u003cth colspan=\"2\" scope=\"colgroup\" style=\"text-align:left;background:#f5f5f5;\"\u003eBattery\u003c\/th\u003e\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\" style=\"text-align:left;width:38%;\"\u003eBattery life\u003c\/th\u003e\n\u003ctd\u003e4–7 days typical use; up to 30 days standby\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\" style=\"text-align:left;width:38%;\"\u003eBattery capacity\u003c\/th\u003e\n\u003ctd\u003e280mAh\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\" style=\"text-align:left;width:38%;\"\u003eCharging\u003c\/th\u003e\n\u003ctd\u003eMagnetic charger, about 3 hours\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\u003cth colspan=\"2\" scope=\"colgroup\" style=\"text-align:left;background:#f5f5f5;\"\u003eDesign \u0026amp; fit\u003c\/th\u003e\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\" style=\"text-align:left;width:38%;\"\u003eStyles\u003c\/th\u003e\n\u003ctd\u003eRound or square\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\" style=\"text-align:left;width:38%;\"\u003eColors\u003c\/th\u003e\n\u003ctd\u003eBlack, blue, red, brown\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\" style=\"text-align:left;width:38%;\"\u003eControls\u003c\/th\u003e\n\u003ctd\u003eTouchscreen and button\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\" style=\"text-align:left;width:38%;\"\u003eWater resistance\u003c\/th\u003e\n\u003ctd\u003eIP68\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\u003cth colspan=\"2\" scope=\"colgroup\" style=\"text-align:left;background:#f5f5f5;\"\u003eConnectivity\u003c\/th\u003e\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\" style=\"text-align:left;width:38%;\"\u003eCompanion app\u003c\/th\u003e\n\u003ctd\u003eH Band\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\" style=\"text-align:left;width:38%;\"\u003eBluetooth\u003c\/th\u003e\n\u003ctd\u003e5.1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\" style=\"text-align:left;width:38%;\"\u003eCompatible with\u003c\/th\u003e\n\u003ctd\u003eiPhone and Android\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\u003cth colspan=\"2\" scope=\"colgroup\" style=\"text-align:left;background:#f5f5f5;\"\u003eIn the box \u0026amp; warranty\u003c\/th\u003e\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\" style=\"text-align:left;width:38%;\"\u003eIn the box\u003c\/th\u003e\n\u003ctd\u003eSmartwatch, ECG holder, chest strap, chest patch, magnetic charger, user manual\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\" style=\"text-align:left;width:38%;\"\u003eWarranty\u003c\/th\u003e\n\u003ctd\u003e12 months\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\" style=\"text-align:left;width:38%;\"\u003eReturns\u003c\/th\u003e\n\u003ctd\u003e30 days\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e","brand":"BKWAT","offers":[{"title":"Black \/ Round","offer_id":43558066487434,"sku":"E400-Black","price":79.88,"currency_code":"USD","in_stock":true},{"title":"Blue \/ Round","offer_id":43558066552970,"sku":"E400-Blue","price":79.88,"currency_code":"USD","in_stock":true},{"title":"Blue \/ Square","offer_id":43558066585738,"sku":"E500-Blue","price":79.88,"currency_code":"USD","in_stock":true},{"title":"Red \/ Round","offer_id":43558066618506,"sku":"E400-Red","price":79.88,"currency_code":"USD","in_stock":true},{"title":"Brown \/ Round","offer_id":43558066684042,"sku":"E400-Brown","price":79.88,"currency_code":"USD","in_stock":true},{"title":"Brown \/ Square","offer_id":43558066716810,"sku":"E500-Brown","price":79.88,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0603\/0291\/7770\/files\/e400-ecg-ppg-smartwatch-main.jpg?v=1793603556","url":"https:\/\/bkwat.com\/products\/bkwat-e400-ecg-ppg-smartwatch","provider":"BKWAT","version":"1.0","type":"link"}