Car Cigarette Wireless FM Transmitter, Megadream FM Transmitter with MP3 Player, LED Display, Dual USB Charge Port, AUX-in, Flash Card Slot, Handsfree Call for Smartphone and Tablet PC High performance digital Wireless car charger mp3 player, Compact, lightweight and simple design With built-in microphone, Built-in FM transmitter, full frequency, Line Enter Jack Multi-functional Design 5 in 1: Wireless in-car Multi function FM Transmitter enables you to do Hands-free calls, enjoy clear music, GPS voice navigation, charge your device. Better for empty channel. Dual USB Charging port: Output voltage, DC 5V, 2A.