With sleep monitoring function pedometer calorie consumption record milemeter etc; - Smart wrist band with OLED screen; - Powered by USB port convenient to use; - IP67 waterproof: you don't need to put it off even in the rain or water; - With silent vibrate mode can wake you up quietly; - Light weight only 20g weight; - Supports bluetooth V4.0 can automatically sync data with PCs iPhone 4S / 5 iPod touch iPad 3 / 4; - Press button to switch between the above data; Press and hold for 2 seconds to switch into sleep mode or temporary active mode; - With vibration reminding and LED flickering reminding function; - When the battery is in low level the LED indicator light turns red and fast strobes; When the battery is fully charged the LED indicator light turns green; - Daily mode: system default setting is that LED light keeps on at 19:00~21:00 everyday or you can press twice time to turn it on / off; When you are in quiescent state LED automatically turns off; When you are walking LED flickers blue light; When you are running LED flickers red light; When the step number is more than 1000 the wrist band will vibrate and flash red light; Alarm mode: reminds you through vibration; - Wrist buckle service life: > 2000 times; - Button service life: > 10000 times; - USB durability: >1000 times; - Working temperature: -20+45C; - Storage temperature: -40~+