Features: Silicone TPU Bracelet Stuff with 0.42inch OLED screen display. Dialog DA14580 CPU Processor, higher performance, safety and stable. Blutooth V4.0, working range up to 10 meters. IP54 life waterproof, good water resistant. 60mAh large lithium ion battery capacity, long standby time. Low Consumption, and long standby. Only compatible with Android OS Devices, like Tablets and Smartphones. Support Pedometer, Calories, Heart Rate, Sleep Monitor, Call Reminder, Distance, Alarm clock, Social sharing, etc.