Product Specifications: Colour: N/A Material: Body: PC+ABS Strap: TPU Machine Size: 384510.8mm Strap Size: 22mm*225mm Machine Weight: 40g Waterproof Level: IP67 Package Size: 1452295mm Package Weight: 100g Carton Size: 49.53124cm FCL Specifications: 50pcs FCL Weight: 10.6kg Certified Product: CE, RoHS, FCC, MSDS, TELEC Hardware Parameters: Display Screen: 1.85 inch TFT high-definition, 240*280 pixels CPU: Realtek8763EW Touch: Full screen touch Key: Rotary Button Bluetooth: BLE5.2 Heart Rate Sensor: LC11S G-Sensor: SC7A20 Speaker: A0916 Standby Time: 35 days Work Time: 5-7 days Battery: 260mAh System Support: Android 4.4 above and iOS 9.0 above, iPhone 5S above