Overview dodocool FM Transmitter allows you to make hands-free calls and listen to music on your mobile devices through your car stereo. It also features an additional USB port for charging your device with an output of up to 2.4A. Compatible with most portable devices with a 3.5mm audio jack. Features Wireless Music Playback Play music on your smartphone or other audio devices through your car's FM stereo. Hands-free function: Allow hands-free calling via the car stereo and your phone's microphone. Stay Charged: The car charger with an extra USB port can charge any of your USB-powered devices with a maximum output of 2.4A while driving. Works with standard 12-24V DC vehicles. Wide compatibility: Compatible with smartphones and other popular audio devices with a 3.5mm audio jack. Easy to use: With an easy-to-read LED display and easy-to-use buttons to tune FM frequencies between 88.1MHz and 107.9MHz. Specifications: Brand: dodocool Material: ABS Color: Black Technology: FM Radio Broadcasting Frequency: 88.1 - 107.9MHz Frequency Response: 20 - 20k Hz Effective Range: ≥ 5m Interface: 1 * 3.5mm audio plug, 1 * USB 2.0 port Car Charger Input Voltage: DC 12V-24V USB Output: DC5V 2.4A Max. Certificate: CE, FCC, RoHS Warranty: 1 Year Limited Warranty LED Display Size: Approx. 2.83 * 1.18 * 0.35 inch / 71.82 * 30.00 * 9.00 mm (L * W * H) Car Charger Size: Approx. 2.82 * 1.32 * 0.65 inch / 71.66 * 33.60 * 16.60 mm (L * W * H) Cable Length: Approx. 3.3 ft / 1 m Item Weight: Approx. 1.60 oz / 45 g Package Size: 13 * 11.6 * 4.2 cm Package Weight: 159.98 g Package Includes 1 * dodocool FM Transmitter 1 * User Manual (English, French, German, Spanish, Italian, Japanese)