Frequency Range: 87.5-108.0 MHZ Product Input:12-24V Charging Output: 5V/3.4A Max Micro SD Cards Capacity:32GB USB Flash Capacity: 32GB Max Supported Music Formats: MP3/WMA/WAV/FLAC Porodo Wireless FM Transmitter Car Charger Stylish and fashionable, enjoy an FM transmitter and dual USB 3.4A charger at the same time and don't worry about your phone charge and focus on your driving while your FM transmitter Play music for you, also you can use USB flash or micro SD cards up to 32GB for listening to music and enjoy more of your driving. with the bass boost, you can manage the level of your music bass and make a pleasant atmosphere for yourself. This FM transmitter has a built-in microphone and when you receive a call or you want to call someone, you can be sure that this product will transfer your voice as clearly as it could be. This FM transmitter car charger is equipped with two quick charging USB-A ports and 15W power delivery with 3.4AMP. You can charge any of your smart devices including the latest iPhones, tablets, iPods, etc. you can use one of the ports for a USB flash drive for listening to music or use both of them for fast charging your phone. this fast car charger by Porodo FM Transmitter can charge your devices 75% faster than typical traditional chargers, no matter whether your car’s engine is working, or you switch it off, it will charge your phone in any conditions