Note: The diameter of the interface is 3.3cm, please measure whether the size of the interface of the car cigarette lighter is suitable before purchasing! Bullet Points: 1LED Display: FM transmitter with LED display window. Frequency and voltage can be displayed. 2Bluetooth Button: Bluetooth start/stop button, stereo music playback. can answer/hang up/reject/resend via Bluetooth. 3Support U Disk: Support the use of U disk to play music; and support MP3/WMA music format, with call ec ho cancellation and noise reduction (CVC) technology. 4USB Output Voltage: Can provide voltage up to 5V/2.5A to other devices; With car battery voltage display. 5Automatic Memory Function: Automatic memory function of power failure frequency point, line audio input function, versatile and powerful. Description: Thisproductispoweredbyacigarettelighter.Ithasavarietyoffunctionsandiswell-made,durable.Welcomeseveryonetoexperience. Specification: Name:G7CarKitBluetoothHands-FreeFMTransmitter Material:ABS+electroniccomponents Color:black,silver Size:about10*8*2.5cm/3.94*3.15*0.98in PackingList: G7BluetoothTransmitter*1 Note: Duetothelightingeffectsandshootingangles,thereiscolordifferenceintheproduct,pleaseunderstand. Duetomanualmeasurement,thereisatoleranceintheproductsize.