Highlight :   - Dimensions: 30mm x 17mm x 12mm   - Weight: 30g   - Material: silicone   - Connectivity: Bluetooth 4.0   - Radio frequency: 2.402 – 2.480 GHz   - Input power: AC110V – 240V DC   - Output power: 5V   - Charging voltage: 3.7V   - Current: < 15mA   - Battery capacity: 100mAh   - Full charging duration: up to 2 hours   - *Color : Pink， Blue， Black， White*