DC main power supply at 12-15 V . Stereo bluetooth® 4 version receiver with A2DP-SINK profile and 8 storable links. Front AUX audio input via 3.5mm stereo Jack input. Rear audio input terminal strip for stereo TV. Memory for 8 bluetooth® devices with active memory and erasing function to add new bluetooth® devices. Bluetooth® access by just pressing a button, instead of introducing a PIN access code. Power on or stand-by, by a short touch. 32-step up/down digital volume control by 2-dB jumps. Direct stereo amplified output for speaker connection or stereo output to an audio stage that amplifies the signal, either individually or simultaneously. PIN input for signals with priority calls over all audio sources. Multicolor led status indicator (Blue for bluetooth®. Green for TV. Yellow for AUX and Red for priority calls). Finish: black. Frame not included.