About this item VERSATILE COMPATIBILITY: The SWM15-PROs multiple input and output connectors including HD Audio Retrun Channel, regular HD ports, 1/8 (3.5mm), optical adapter and built-in Bluetooth enables the SWM15-PRO to be compatible with a vast variety of devices including smart TVs (HDMI ARC required), streaming devices, TV boxes, Blue-Ray players, laptops, i Pads, tablets, home theaters, receivers, soundbars, external speakers and more HD Audio Return Channel FUNCTION: Please check the pictures for CEC/PCM setting guidance. Please help make sure to enable your TVs CEC and choose PCM as audio format under expert setting on the TV. The HD Audio Return Channel on the SWM15-PROS karaoke mixer allows you to extract the audio from the TV to the mixer. This allows the mixer to blend the music and vocal, and send the mixed signals to a soundbar or amplifier (HDMI cable is not included)