This replacement bass knob for the SKv2 series amplifiers makes for an ideal choice when you want to have quick access for adjusting the level of one or multiple amplifiers configured far away from your reach. Specifications Skar Audio SKv2 Bass Control Package Remote Amplifier Level Controller Allows You To Adjust Your Bass Level Quickly and in the Most Ideal Location Compatible with the following models: SKv2-1500.1D SKv2-2500.1D SKv2-3500.1D SKv2-4500.1D Works With Most Head Unit / Amplifier Combinations