FM transmitter with Bluetooth for music transfer and hands-free It can function as an FM transmitter or Bluetooth hands-free. The FM transmitter is equipped with a microSD reader, USB reader/charger. Works with all phones with Bluetooth. Perfect for, for example, streaming Spotify or other music to the car's sound system/speakers. The device has a built-in microphone for calls and an answer button to answer/hang up. There is also an LCD display that shows the radio channel you should set the stereo to to get the sound out of your speakers. Switches automatically between music and calls/calls and music when it rings or when you hang up. FM transmitter with Bluetooth for music transfer and hands-free It can function as an FM transmitter or Bluetooth hands-free. The FM transmitter is equipped with a microSD reader, USB reader/charger. Works with all phones with Bluetooth. Perfect for, for example, streaming Spotify or other music to the car's sound system/speakers. The device has a built-in microphone for calls and an answer button to answer/hang up. There is also an LCD display that shows the set radio channel you should set the stereo to to get the sound out of your speakers. Switches automatically between music and calls/calls and music when it rings or when you hang up. Specifications: Support for microSD cards 2x USB sockets for USB memory or charging the phone A2DP Music streaming Product parameters: Interface: high-speed USB2.0 Display: LED display Source: Cigarette lighter Memory card type: TF card Power supply: DC12-24V Supported file type: MP3 / WMA Operating current: 50-100mA DC12V Bit rate: 64-320 kbps FM frequency range: 87.5-108 MHz Signal / noise ratio: 85db (FM: 65db) Harmonic distortion: