Overview dodocool FM Transmitter allows you to make hands-free phone calls and listen to music in your mobile devices through your car stereo system. It also comes with an extra USB port to charge your device, up to 2.4A output. Compatible with most portable devices with a 3.5mm audio jack. Features Wirelessly Music Play Play music on your smartphone or other audio devices through your car's FM stereo system. Hands-free Function Allow hands-free phone conversation through 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 maximum output of 2.4A while driving. Work with standard DC 12 - 24 V vehicles. Wide Compatibility Compatible with smartphones and other popular audio devices with a 3.5mm audio jack. Easy to Use With easy-to-read LED display and easy-to-use buttons to adjust FM frequencies between 88.1 MHz to 107.9 MHz. Specifications : dodocool Material: ABS Color: Black Technology: FM radio Transmitting frequency: 88.1 - 107.9 MHz 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 in / 71.82 * 30.00 * 9.00 mm (L * W * H) Car Charger size: Approx. 2.82 * 1.32 * 0.65 in / 71.66 * 33.60 * 16.60 mm (L * W * H) Cable Length: Approx. 3.3ft / 1m Item weight: Approx. 1.60oz / 45g Package size: 13 * 11.6 * 4.2cm Package weight: 159.98g Package includes 1 * dodocool FM Transmitter 1 * Instruction Manual (English, French, German, Spanish, Italian, Japanese)