Details: Wireless Bluetooth Headsets Handsfree Car Kit Bluetooth Headphones Earphones for Single Ear1. Bluetooth protocol: HSP, HFP, A2DP2. Bluetooth version: 4.03. Talking time: 4h;4. Playing time: 3h;5. Standby time : 100h;6. Charging time: 2h;7. Transmission distance: 10m;8. Weight: 6g;9. Impedance: 16ohm;10. Frequency response: 20-20kHz;11. Charging input: 5V/300-500mAWireless Bluetooth Headsets Handsfree Car Kit Bluetooth Headphones Earphones for Single Ear PictureFunctions: Wireless Bluetooth Headsets Handsfree Car Kit Bluetooth Headphones Earphones for Single Ear1. Support remote control of play/pause, next song/last song,volume up/volume down,pick up/hang up/ reject the phone calls,last number redial.2. Pause the music