L700 3 in 1 Wireless Sports Noise Reduction Headset Supports Bluetooth 3.5mm TF Card Features: 1. Using Bluetooth 5.1 technology, it can be easily and quickly paired with smartphones, tablets and other Bluetooth-enabled music devices. 2. Built-in high-definition noise reduction processor, the noise reduction capability is greatly enhanced, and music calls are clearer. 3. With tight-fitting ear pads, it is comfortable to wear and does not press against your ears. 4. Supports both wireless and wired modes: wireless headphones, which can reduce the radiation of mobile phones and free your hands during calls. For use as wired headphones, the audio cable plugs into the headphone jack. Convert from wireless to wired headphones in seconds. Specifications: 1. Bluetooth standard: V5.1 2. Effective range: 10 meters 3. Working hours: up to 10 hours 4. Standby time: up to 200 hours 5. Rated power: 20mW 6. Battery capacity: 400mAh 7. Charging interface: Type-C 8. Impedance: 32 ohms 9. Sensitivity: 105dB+-3dB 10. Frequency response: 20Hz-20KHz 11. Driver unit: 40mm x 2 Packaging list: - Bluetooth headset x 1 - Audio cable x 1 - Charging cable x 1 - Chinese and English instruction manual x 1