NVX - XVRC2 Universal Bass Knob Level Controller with Built-in Digital Voltmeter, Remote Gain and Amplifier On/Off Switch

General Features: NVX Remote Level Controller with Digital Voltmeter. Can adjust the amplifier gain even while driving. In-dash or Under-dash mountable. Compatible with most head units/amplifiers combinations. Rotary push turn ON/OFF knob for amplifier. Digital volt-meter (10V ~ 15. 9V). Blue LED display (high voltage / low voltage). Authorized Internet Dealer. 1-year Manufacturer's Warranty. Check out the NVX XVRC2 Owner's Manual