Notes:<br />1. Be compatible for Android phone(OS must be android 4.3 or above and bluetooth must be BT4.0 or above )・ and iOS phone(iOS must be iOS 7.0 and bluetooth must be BT4.0 or above)<br />2. APP: Mistep<br />3. Life Waterproof: not for shower or swimming.<br /><br />Basic Information:<br />- Brand: Diggro <br />- Model: K18S <br />- Color Black <br />- Wristband Material Silicon <br />- Max Perimeter  19cm/7.8"<br />- Min Perimeter:13.5cm/5.31"<br />- Wristband Width:1.5cm/0.59"<br />- Net Weight 21g <br />- Main Chip:Cortex-M4 <br />- G-Sensor:Triaxial accelerometer <br />- Heart Rate Sensor:PPG <br />- Bluetooth 4.0 <br />- Screen Material:OLED <br />- Battery:120mAh li-battery <br />- Normal Using Time:10days<br />- APP language:English・ Korean・ Japanese・ Russian・ French・ German・ Abric・ Spanish・ Portuguese・ and Chinese <br />  <br />Package <br />Size 9 x9x 6.5cm <br />Weight 150g <br /><br />Products Contents: <br />1 x Smart Bracelet <br />1 x Charging Cable <br />1 x English/Chinese User Manual