The Seiko Head-Unit-STP411B is a state-of-the-art digital head-unit used in automotive applications. It includes a 4.1 inch full-colour TFT LCD touch display, built-in Bluetooth compatibility, 4x50 watts maximum audio output, 2V preamp output, Rear USB 2.0 port, Rear Aux-in jack, Front USB 2.0 port, Front Aux-in jack, AM/FM radio tuner, and a CD/DVD player. The STP411B also features a multi-functional steering wheel interface, Illuminated keypad control, FLAC audio format support, and multiple other features.