Titanium Grey Stainless Steel 46mm Graphite Black Silicone Strap 46.5 x 46.5 x 10.6 mm 46 g 50m water resistant Compatible with standard 22mm straps Material: Metal + Plastic + Ceramic Display: 1.39 inch AMOLED 454 x 454 HD The AMOLED touchscreen supports slide and touch gestures. Bluetooth: BT4.2, BLE Sensors: Accelerometer sensor Gyroscope sensor Magnetometer sensor Optical heart rate sensor Ambient light sensor Barometer sensor Battery Life: 14 days for typical use. (The typical usage scenarios are decided based on the user habits. The specific battery life depends on the user habits and usage frequency.) Charger Voltage and Current Requirements: 5V 0.5A / 1A / 1.5A / 2A In Box: Packing List: Watch x 1 Charging cradle x 1 Charging cable x 1 User Guide x 1