Firstsing nRF51822 Fitness IPX7 Waterproof Activity Tracker with Pedometer Heart Rate and Sleep Monitor Bracelet Step Calorie Counter Smart Watch for IOS Android

Waterproof:IPX7
Host Material:TPU+PC
Strap Material:TPU
CPU:Nordic nRF51822
Memory:16KB RAM＋256KB ROM
Bluetooth:BLE 4.0
Antenna:Built-in ceramic antenna
G-sensor:ST LIS3DH
Screen:0.49'' OLED (64*32)
Vibration:Yes
Battery:Li-Polymer 60mAh
Standby time:10 days
Charging Time:2 hours
Charging port:Pigo contact recharging
Main Function:HRM
Data Share:Pedometer,Sleep monitoring,RTC,View your fitness, sleep and HR records,Share and compare your data with friends,Support data cloud store,Fitness plan.
Reminder:Call reminder,SMS Message reminder,Anti-lost reminder,Find my phone and Locate my band,Silent vibration
Application system: IOS 7.0 above,Android 4.3,Support Bluetooth 4.0 BLE Mobile phones.
Track your all-day activities such as distance travelled, steps taken, calorie burned, heart rate, sleep. Connect with mobile's Bluetooth, you can check your other sports data and sleep data can be also checked in the App.