With the Bluetooth Technaxx FMT900BT transmitter you can conveniently accept, end and redial phone calls with just one button. Just plug its input power adapter DC 12-24V into the cigarette lighter socket of your vehicle and start using it. The transmitter supports MicroSD cards and USB sticks up to 32 GB for playing music in MP3 or WMA format. Without your intervention, incoming calls are switched from music to handsfree operation, which is achieved thanks to a built-in microphone. The trendy design with LED display of 0.79"x0.31" and easy handling are rounded off by two powerful USB ports for charging mobile devices. The Technaxx FMT900BT can be easily paired as a handsfree system with any Bluetooth 2.1 or higher compatible device.