Main Features: nRF51822 chip and Bluetooth 4.0 technology: Adopt nRF51822 chip and Bluetooth 4.0 technology Heart rate monitoring: Measure the value of your heart rate, let you know about your heart rate during sports. Pedometer / Sleep monitoring / Sedentary reminder: monitor the daily movement, the quality of your sleep and remind you to have a rest. Enjoy unfettered moment while helping you achieve your health goals. Distance measurement: Measure your daily walking distance precisely. Calorie consumption management: Calculate the consumption of calorie, record the daily burned calorie. Remote camera: Can control your smart phone to take photos, and you can enjoy the pleasure on your wrist. Call reminder: When a call is coming, you can check it without taking out of your mobile phone. Anti-lost: Unique proximity sensor system, take good care of your smart watch and phone. Normal using time: about 3 - 5 days, standby time: about 7 days .Type of battery: Li-polymer Battery Battery Capacty: 70mAh Standby time: About 7 days Charging time: About 60minsDial size: 4.09 x 2.0 x 1.25 cm / 1.61 x 0.79 x 0.49 inches Band size: 26 x 1.5 cm / 10.24 x 0.59 inches Case material: Stainless Steel Band material: TPE