Feature:Adopt DSP technology,call Echo Cancellation and noise reduction(CVC) TechnologySupports Smart phone Bluetooth music and u driverBuilt in high sensitive microphone and powerful speaker for excellent sound qualityAutomatically turns on and Bluetooth reconnects when car stars,and shuts down after leaving carAutomatic memory functionSupport Bluetooth status indicationSupport Bluetooth/USB driver switchSupport connection status beepSupport MP3/WMA format music playBluetooth version 4.0Supports HSP, HFP,A2DPSupports mobile phone of length: 58-85mmUSB Max: USB MaxSupport 4 FM Frequency: FM89.0/FM90.5/FM101.8/FM107.7Bluetooth version: V4.0Package Included:1 X FM Transmitter MP3 Player1 X Flexible Hose1 X Sucker1 X Car Charger1 X User Manual(Cellphone not included)