Quantity 1 piece(s) Material PVC Color Black Type Electronic Device Function This Handsfree Bluetooth interphone allows you to answer a phone call and enjoy your favorite music from your cell phone; Perfect for you as you are ridding Bluetooth Version V2.0 Transmission Range 100 m FM Frequency 76~108 MHz Speaker Power 4 W Power Supply Built-in 300mAh lithium battery Working Current 10mA Packing List 1 x Bluetooth intercom 1 x Microphone (35cm) 1 x Clip 1 x USB cable (60cm) 1 x 100~240V power adapter (2-flat-pin plug) 2 x Screws 1 x Chinese/English user manual