Product information: Battery capacity: 280mAh Waterproof grade: lP67 Standby time: 15 days Bluetooth version: 5.1 Support system: IOS 8.0 or above, Android 4.4 or above Charging duration: 2 hours Material: tempered glass/zinc alloy/TPU Case material: aluminum alloy Appearance size: 49.3 * 37 * 11.8mm