The Xtenzi Brand External Remote Knob XTBR43-91598 Bass Boost Wired Variable Level Controller (secondary gain control), high quality product remote unit comes with 5Meter/16F long Flex remote connection wire/Cable and Bass Knob. Compatible Devices: - RP-350.1D - RP-800.1D - RP-800.1DM - RP-1200.1D - RP-1500.1D - RP-1500.1DM - RP-2000.1D Caution before purchase: Ensure the Xtenzi Bass remote is exactly compatible with your amplifier before purchase Please note NOT all amplifiers are compatible or will be properly controlled with this item. Ensure the Xtenzi Bass remote is appropriately installed with the above mentioned compatible devices, installing the Bass Remote with a non-compatible device may cause your device not to work What is Included within the Package: Xtenzi Remote Bass Knob 5-Meter (196-inch) long Cable Install Manual