onn. Bluetooth LED FM Transmitter Car Charger with LCD Screen: LED color changing lights Up to 32 GB MicroSD/TF memory card slot for music streaming Hands-free calling with answer/hang-up button 3 ports (2 USB + 1 USB-C) for pass-through charging Output: 1 USB 1.0A, 1 USB and 1 USB-C 3.1A Bluetooth wireless technology streams audio from all your devices over your FM car radio Built-in noise cancelling microphone Supports FM frequencies 88.1 - 108 Mhz Plugs into your car's auxiliary power outlet Input: 12V/24V