Features: Economical FM transmitter can provide you good stereo. Built-in lithium battery with IC protection, fully charged for 2-3 hours. Hands-free: It transfers music to your car, making it safer to enjoy music while driving. Eco-friendly design: Easy-to-use two-button control, last-frequency memory, and a blue-backlit LCD display provide good visibility in the dark. Wide Compatibility: Compatible iPod / iOS 6 in 5 S / 4S / 4G / 3GS / 3G / SUMSANG / HTC / Nokia / Other MP3 / MP4 players and other smart phones and audio devices with a 3.5mm audio jack. Description: Turn on the car radio and turn the frequency to the same frequency as the transmitter, then play the music on your phone and you can enjoy it on the radio and hands-free. Specification: Material Type: ABS + Metal Model: FMVoltage transmitter 5V Output power: 87.5-108.0MHZ Size: 59*20*10mm Weight: 64g Package Included: 1 FM transmitter