Smart band fitness tracker, CPU: Mcube MX1003 Sensor: MC3613 HR Sensor: HRS3300 Display: 0.96" screen Date transmission: BLE4.0 Memory: 16KB+512KB Charging interface: USB Stand packing: 1 smartband, 1 user manual, and one gift box. Weight: 25g Battery: 80mAH Li-polymer Charging time: about 2 hours Strap material: TPU Dimensions: 250* 19.4* 11.9mm