Usage: 1. Frequency Modulation: Turn on car radio and select no broadcast frequency 2. Frequency Match: Insert this into car lighter and set the same frequency 3. Insert memory or USB flash drive to , or connect your phone with via . 4. Then the will automatically play the your memory card, USB flash drive or mobile phone. Description This is a , car Stereo, MP3 music player. The -free solution to bring wireless audio to your existing car stereo and listen to your favorite songs. You can connect it with your Phone or , play your favourite music to relax your body and mind during your driving. You can also insert into the slot, then automatically play and transmit the MP3 and WMA music. Feature - - Material: ABS - Size: 5.6 x 5.5 x 7cm - Display: 1.3inch - Working voltage: 12V/24V - Frequency Range: 87.5 - 108.0MHz - Bluetoot version: 4.1 - Wireless Range: 0.5-2M - Digital Compatibility: MP3 WMA - Built-in Transmitter - Car and Vehicle Compatibility - Wireless Streaming Receiver - MP3 Digital Support - USB Port for Device Charging - design and simple plug-in Operation - Transmit Your Phone Calls Through Your Vehicle's Speakers - Micro USB Flash Drive Readers - Digital LCD Display with Simple Button Controls - Usage: After the was set into mode, open the of your phone and search "car kit", then "match". After your phone is successfully connected to the , you may enjoy wireless music and hands-free call. Note: This product is for audio input, not for audio output. The audio cable can not be connected directly to the AUX interface of the car. Package list: 1 x