TWS Wireless Earphones X1 With Charging Case Stereo Sports Waterproof Earbuds Headsets With Microphone. 1. BTversion: V5.1; 2. Earplug battery capacity: 50mAh; 3. Charging box battery capacity: 300mAh; 4. Working hours: 220H; 5. Standby time: 280H; 6 Operation mode: touch; 7. Waterproof rating: IPX7; 8. Product color: black; 10.Battery voltage: 3.7V; 11.Input voltage: 5V; 12.Transmission distance: 10M; 13.Speaker: 20-20khz; Specifications: 1. With the adoption of CVC8.0 noise reduction technology and dual-mode decoding, the earphone can bring you excited playing and using experience. 2. The Bluetooth-compatible V5.1 technology allows for non-delayed, stable and quick transmission, which can bring you pure and lossless sound effect. 3. Made of ABS material, the Bluetooth earphone is eco-friendly and durable to use. 4. The Bluetooth earphone is suitable for playing games, hands-free calling, listening to music and so on. Package Included:Earphone*1(Charging box + left and right earphones),Charging cable*1,Manual*1.