Product Description: Bluetooth Version:Bluetooth 4.0 Transmission Range:Transmission Range Screen Type:0.96 inch TFT Color Touch Screen Screen Resolution:80 *160px Sensor:RT3000 PPG Shipset:EM7028 Waterproof:IP67 Level Professional Waterproof Total Length:235mm Band Width:22mm Main Unit Size:4.1cm*1.2cm*1.9cm(Length x Height x Width) Bracelet material:ABS, main body cover PC, strap TPUBattery Capacity: 105mAh Polymer Lithium Battery Charging Time:about 1 ~ 2 Hours Working Time:5 to 10 days ( specific using time depends on frequency of using and frequency of push contenct ) Standby Time:Up to 30 days Virbation:Loundspeaker Mute / Vibration Features: 1. Multifunctions: color screen, real-time clock, pedometer, calories counter, distance counter, sleep monitor, alarm alert. 2. Daily Activities Recording: you can check daily activities including steps, distance and calorie consumption in the app. 3. Languages: wristband supports Chineses and English. APP supports Spanish, French, Portuguese, Netherlands, German, Russian, English, Chinese. 4. Waterproof: IP67 Level Professional Waterproof Support 50 meters Deep Swimming. etc. 5. Sleep Monitoring: the watch can recognize your status automatically and monitor the whole sleep progress by analyzing the deep sleep and light sleep hours. Package Include: 1 x Smart Bracelet 1 x Charger 1 x User Manual