Smart wristband is a smart wrist with corresponding app, build- integrate Blutooth 4.0, 3D Sensor and PC cloud service. It helps people to improve healthy, saves time to check smart phone frequently and remind smartly. Material: TPU Charging: USB Battery Capacity: 60mAh Stand-by time: 10 days Use time: 5-7 days Data Transmission: Bluetooth 4.0 & USB Indicators: Four LED indicators. Environmental Temperature & Humidity for operation:0°C~+40°C,20-85%RH Environmental Temperature & Humidity for storage and transport: 0°C~+40°C,10-95%RH Color:various color Brand:OEM Certification:CE/RoHS Manufacturer warranty:1 year