You may need an In-car FM transmitter to stream music from your phone, tablet, MP3, MP4, TF card, even USB flash disk to the car stereo system. Enjoy music on the go. This one is a good choice for you. This item is well made of premium material for durable and practical use. It's easy to use with long service life. The precise design will ensure its practicability in the work of high performance.Feature- Color: Black.- Material: ABS.- Size: Approx. 120 x 9 x 8 cm / 47.2 x 3.5 x 3.1 inch (L x W x H).- Speaker power: 2W- Microphone sensitivity: -38DB- Headphone power: 0.4W- Input voltage: 12-24V- Speaker resistance: 20 Omega;- Power: 0.5W- Frequency response: 87.5-108- Operating temperature: -30-50 - Cable length: 100cm- Supports playing music by USB disk- Supports MP3/WMA/WAV/FLV music format- Dual USB output voltage provides powers to other Devices up to 5V/2. 5A.- Automatic memory function of power failure frequency point. - Listen to music on the journey must be very relaxed.- It can automatically adjust the output power to different smart phone, like iPhone 7/7/6s, iPads, other smartphones and tablets, GPS units, iPods, MP3 players and more.