Celebrat A4 Wireless Bluetooth Headset Noise Control Enjoy M

Use: portable media player, mobile phone, computer function: bluetooth, microphone, noise cancelling drive unit:40mm impedance:32ω input voltage:dc 5v bluetooth version:v4.2 transmission distance:10 m certificate:ce rohs fcc call time:8-10 hours(70%volumn) music time:8-10 hours(70% volumn) battery capacity:300mah