Product description BESTEK Wireless In-Car Full Frequency FM Transmitter • Hands-free calls, enjoy clear music, GPS voice navigation, charge your devices • Manufacturing and providing best and superior quality products with professional customer service and end-users. Features • BESTEK Wireless In-car FM transmitter provides you not only ultra convenience when driving but also safety because you don't need to look for your iPhone or slide to unlock. • Dual USB charging ports gives you continues power during a trip or on the go for most USB devices. • Simple and practical press buttons involve all the functions device equipped. No extra tools for combined working. • Display window shows the FM number in a fastest way to find your favorite program. • Music format support MP3/WMA/FLAC. Specifications • fit to all types of Vehicles(12-24V) • Digital Display • Support Bluetooth module • Support 3.5mm Line audio Output • Support USB flash Disk Player • Support MP3, WMA format music • Support Phone call answer, hang up, reject and other functions • Support dual USB Charging, the maximum output voltage 5V / 2.1A • Automatic power-off memory function • Transmitting Distance: >10M • FM transmitter frequency range : 87.51MHz to 108MHz Use Guide • When connecting via a Aux cable, you need to plug your external device first, and then plug the FM transmitter, reverse operation do not support music playing. • When simultaneously connecting Bluetooth, inserting USB Disk or Aux cable, the FM transmitter default playing music from the latter.