Feature:<br />1. Main function: Heart rate monitoring， pedometer， calorie recording， sleep quality monitoring， synchronization date and time， notification， anti-loss alarm， find phone， sedentary alarm and so on.<br />2. Lightweight: 20g， it's quite handy and even wears asleep. Reaction OLED touch screen - through a short touch / long touch 5 seconds unique key， you can easily read the step count， heart rate， calories， time， date， message and so on.<br />3. Main Specifications: Bluetooth 4.0. Support for IOS 7.1 or later (i 4S， 5 / 5S / 5C， 6 / 6S Plus， 7/7S Plus， etc.); Android 4.4 or higher (download APP from App Store or Google Play， smartphone only ， Does not apply to PC or tablet).<br />4. High-quality polymer rechargeable battery to ensure long battery life: about 7-10 days standby time / 4 days operating time.<br />5. Bracelet language: sync with your cell phone language or English.Lightweisght and breathable design make your life healthy and stylish.<br /> <br />Product Specification:<br />Color: Red/Blue/Black/Green<br />Bluetooth version: Bluetooth 4.0<br />Person: female table， male watch<br />Waterproof: Yes-Daily waterproof<br />Screen: Yes<br />Screen Type: OLED<br />Compatible operating systems: Android， IOS<br />Compatibility: Android 4.4 / iOS 8.0 and later systems<br />Battery type: Lithium polymer battery<br />Battery capacity: 80 mAh<br />Power supply: built-in battery<br />Standby time: 3-7 days<br />Function: continuous monitoring heart rate， ECG， A-pple health， blood pressure， calories， WeChat movement，Alarm clock， find your phone， step counter， cushion reminders， sleep management<br />Case Material: PC<br />Stripping material: Silica Gel<br /> <br />Packing List: <br />1 x K1 Smart Bracelet <br />1 x Charging Cable<br />1 x User Manual