Model: DKTW64
Waterproof standard: IP - X6
Material: appearance, hand belt: TPU
The main chip: Quintic QN9021
The bluetooth chip: Quintic QN9021
Bluetooth version: 4.0 BLE (low power)
Memory: 64 KB RAM + 64 KB ROM
Sensors: gravity acceleration sensor
The battery specification: 301425
PCB size: 34.6 * 14.5 * 14.5 mm
Display: OLED64 * 32 mm

Video here for TW64 bracelet

https://youtu.be/5xxTCXFrBEY

Power consumption: normal use for a week, standby for three months
 pedometer, distance measured , calorie consumption management, sleep , time display, event remind (custom of drink water, take medicine, meetings, etc), phone calls reminding, information remind, clock display, sedentary, vibration alarm clock.

Support models: the iPhone 4 s / 5/5/5 s/c 5/5 p IOS6.1 and above version, android version 4.3 and above