Features: With the controller, you can conveniently adjust the gain level or Volumes of the device while driving. This Stereo adjuster allows you to fine tune the Stereo input and output signals, and also features built in amplifier and video capabilities for an enhanced audiovisual experience. Designed for car Stereo enthusiasts and multimedia lovers, this product is perfect for those seeking high quality sound and expanded Stereo and video functionality in their vehicles. Whether you want to improve your car Stereo system or enjoy multimedia entertainment on the go, this Stereo adjuster is a must have accessory. Take your car meetings or presentations to the next level with this Stereo adjuster, ensuring clear and powerful sound transmission for effective communication. Specifications: Material:ABS Interface:2RCA Output 2RCA Input Note: Please allow 1mm errors due to manual measurement. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Package includes: 1x Bass Knob Control