Master Chip: QUINTIC QN9021 PCB Size: 34.6*14.5*0.8 Strap material: Rubber System: Android 4.3 and above/ IOS 6.1 and above Bluetooth version: Bluetooth 4.0 or above Sensors: Gravity acceleration Sensor Display: 0.49 inch OLED screen Basic function: pedometer, calorie counter, sleep monitor, distance tracker, incoming call and sms alarm, email remind Available color: black, blue, orange, red, pink, lime and according your requirement Battery life: Rechargable ( working 10 days after full charged) Camera control: support Featured Functions: Record your daily steps of walking , accurate sensing your walking, running , jumping , etc. trajectory. Combined with the number of steps you walk accurate calculation of the daily movement distance . It can accurately monitor your calorie consumption , accurate measurement of your every tiny movement . SB64 smart wristband can track your sleep patterns during sleep little activity . You can see the number of hours of sleep , sleep time , shallow and deep sleep and wake up time . Portable,weather monitor,automatic record motion calories, exercise steps,moving distance and quality of sleep,body guard posts,help you healthy life. The right moment to make your sleep cycle to wake up and feel energetic ; are set according to your activity plan , timely reminder. Connect the phone or computer can transmit data after the end of the exercise , allowing you to manage your campaign data anytime, anywhere. Compact, waterproof and dust proof ; variety of colors, suitable for different people wear ; understated luxury connotation, highlight your unique charm and temperament. Bluetooth 4.0 Low power consumption; support IOS, Andriod systems