IP67，Bluetrum AB5681，BT 5.3

Display: 1.95 inch- AMOLED  screen-410*502

Body material: Zinc alloy+Plastic

Strap material: Silicone 

Heart rate sensor:HX3918

Compatible: android 4.4+ / ios 9.0+

Function:Bluetooth call, voice control, message screen constant light,  breathing training, calendar, payment code, smart Island, calculator, password unlock, custom dial, weather forecast, music control, step counting, heart rate, sleep, sedentary, mileage, blood oxygen, blood pressure, search, calories, message push, SOS, game, ( 6 menu UI ) sync contact list more than 100+, 100+ sports mode, menstrual cycle

Battery capacity:  300mAh

Charging method: USB Magnetic wire

Charging time: 2 h

Typical usage battery life: about 5-7 days

Basic usage battery life: 30 days

Heary usage battery life: 3-5 days

APP: Fit Cloud Pro