Base Level Controller with Digital Voltmeter is-AKNVD-5

• BASS LEVEL CONTROLLER: Adjust the amplifier gain with a convenient rotary push turn On/Off knob.
• BUILT-IN VOLTMETER: Prevents damage to your car audio equipment by monitoring your car's amplifier voltage at all times.
• SIMPLE INSTALLATION OPTIONS: Easily install this bass control knob in-dash or under-dash.
• COMPATIBLE WITH MOST SYSTEMS: Whatever your system build looks like, this IS-AKNVD-5 Bass Knob is compatible with most head units and amplifier combinations.