🎶 Turn Up the Volume, Turn Down the Worry! Seamlessly integrates with most head units and amplifiers. Monitor voltage levels effortlessly with a sleek digital display. Easily toggle your amp with a simple push. Transform your audio game with precise gain control. Built to withstand the rigors of your audio adventures. Blue LED Display Remote Gain Control Digital Voltmeter (10V~15.9V) The CT Sounds Universal Bass Knob is a versatile audio control device featuring a digital voltmeter with a blue LED display, allowing users to monitor voltage levels from 10V to 15.9V. It offers remote gain control and is compatible with most head units and amplifiers, making it an essential addition for any audio enthusiast. Its durable design and pushable ON/OFF switch ensure ease of use and longevity.