[CE ROHS approval] Unisex Sports Bluetooth Smart Bracelet Wristbands Watch Steps Counter Calorie Health Sleep Monitor for Android Smartphone IOS iPhone Sports Bracelet with Minimalist design,host with wireless USB port charging, You connect this directly to your computer or a USB device to charge the built-in battery. This is also how you can connect it to your computer and unload data Smart wristband support pedometer, sleep monitor, waterproof, alarm clock, anti-lost, looking phone and smart camera and so on. Waterproof IP65 and muti-functions to let you have more experience, please note that don't swimming or diving Smart band device is very comfortable to wear as it is made almost entirely out of silicone and is very smooth. Attach it to your wrist is very easy as everything just sort of snaps into place thanks to the stretchy silicone material. Comfortable Wearable: maximum length is 7.6 inches, wearable minimum length is 5.5 inches, the widest point length is 0.7 inches Compatibility: requires Android 4.4 or above, iOS 7.0 or above, Bluetooth 4.0 or above. Not Fit For: Lenovo, TCL, Asus phone. download APP "Zeroner Health " from Apple Store or Google Play for free We promise: an 30-day money-back guarantee, if the purchase has any quality defect. so please feel free to purchase. If you have any question with the item, please email to us.