Auxiliary Input (3.5mm). USB Input with iPhone Connectivity, Charging and MP3 Capability. Compatible with MC-TR Wired Transom Remote and WS-A Link Sed/Receive Kit. BALANCE/FADER Allows adjustment of the Balance (Left/Right) and Fader (Front Rear) of the main outputs – both powered & pre-amp. Rotate the MCK to highlight the desired function, depress the MCK then rotate the MCK to adjust the function. EQUALIZATION The WS-MC2 has 7 different factory equalization settings for the 7 Band equalizer. Also available is CUSTOM setting, allowing the user to set their own equalization curve. Rotate & depress the MCK to select one of 7 the bands of equalization, rotate the MCK to adjust. Included with the WS-MC2. Wiring Harness & Mounting hardware.