product functions: 1. Wireless headphone functions 2. Headset with FM radio functions 3. wireless net chat 4. monitoring 5. wired earphone 6. super bass                                        7.cancelling noise                                  8.DC4.5V power supply.                       Transmitter                            *Transmitting frequency: 84~87MHz Power supply: AA DC 1.5v batteries 2pcs                *Receiver Receiving frequency: 84 ~ 108MHz Max receiving range: 30m FM radio frequency: 88~108MHz

8 IN 1 wireless headphone