M2 Bracelet Smart Watch Fingerprint Sport Healthy Heart Rate Waterproof Bluetooth Fitness Tracker, IP67 Waterproof Smart Wristband, with Calorie Counter Watch Pedometer Sleep Monitor, For Kids Women M

Chip Model: NDF51822 Battery Battery Capacity: 60MAH Standby Time: 300 Hours Weight: Net Weight: About 6.9g Charging Method: USB Charging TPU Strap: Total Length: 235mm Adjustable Length: 155-210mm 2. Width: 19mm Display: OLED 0.42 inch heart rate: green Touch: Single-point touch sensor: low-power 3-axis acceleration sensor, waterproof: IP67 Bluetooth: Bluetooth 4.0 compatible (Android and