Newest QS90 Smart Bluetooth Bracelet Heart Rate Blood Monitor Sport Tracker Waterproof 30M Pedometer Wristband built-in microphone allows a high-quality

built-in microphone allows a high-quality inline microphone for hands-free calls

Standby time: 100 hours

1 x Tachograph

2 My MP3 or Nokia devices only allows a max or 800mAh or even 500mAh

Newest QS90 Smart Bluetooth Bracelet Heart Rate Blood Monitor Sport Tracker Waterproof 30M Pedometer Wristband built-in microphone allows a high-qualityProduct Features: A Touch Key Screen on the Bracelet It's more convenient to read the time, steps, mileage, calorie and goal. 0. 96 inch OLED Touch Screen Big Screen Big screen size with high definition picture displaying gives you great experience. Remote Notifications Smart bracelet will vibrate when receive phone, information. Even the mobile phone is in a nosy environment. Still dont have to worry about missing important calls and messages.