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

Three Features in one Easy to Use Device With the NVX XVRC2 you get three easy-to-use functions right at your fingertips.

This device has a built-\in voltmeter, on/off switch, and bass knob all-in-one.

It's critical to always monitor your vehicle's voltage so you can prevent any damage to your car audio equipment.

The digital display is crisp and easy to read in any lighting situation.

With the NVX XVRC2, you can get the advantage of having both a digital voltmeter, the on/off switch, and a bass knob in one package.