Transmission range: 10 metersFunction; battery display, call function, support music, multi-point connectionBluetooth protocol; 5.0Channel; stereoUse method; earbud typeWhether single or both ears; bilateral stereoColor: black, white, redProduct Name: TWS-7 binaural wireless Bluetooth headsetFeatures: waterproof and sweatproof, wireless Bluetooth, 3D stereo, etc.Battery capacity: 50 mAHCharging compartment capacity: 500mAHCharging time: 1.5hPlay time: 3-4hPlay time: 3-4hBluetooth distance: 10 meters