Avoid danger, answer, hang up, reject your calls or recontact your interlocutor in one click. Hands free, other features available. Convenient to charge your phone at any time. Allows you to charge phones, tablets, iPhone, iPod, iPad, Samsung phones and other mobile devices. Listen to your music, full frequency FM transmitter, digital display, easy channel selection. High performance stereo playback by Bluetooth, avoid extraneous noise, support MP3, WMA audio input from USB disk, TF card. Status display on LCD screen and automatic shutdown, memory function. . Bluetooth version: 2.1 + EDR: Allow you to pair your devices by built-in Bluetooth, hands-free system allows you to have safe telephone conversations. The sound will be transmitted through the speaker of your vehicle radio. . Excellent Sound Quality: Built-in high performance microphone with echo cancellation and noise elimination (CVC) technology, which can provide clear sound and better Hi-Fi stereo music. . Multifunction: Not only a car Bluetooth FM transmitter, You can also plug in a USB key for streaming music from MP3 / WMA files or connect your devices with the Audio cable to the Jack socket if you want and if your devices do not don't have Bluetooth. There is also a slot to put a TF card. . Fast and smart car charger: 5V/2.1A USB output for fast charging your portable devices, and it will automatically adopt the output according to the connected device. . Compatibility: This transmitter is compatible with almost all Bluetooth devices! As a hands-free kit, it is compatible with all devices with Bluetooth, including iPhone, iPad, Samsung Galaxy, other smartphones, MP3, PS3, TV, computer and tablet etc; and as a car charger it is universal.