The GDS�� Audio��� amplified speaker can be hardwired into the cab of your vehicle - with no batteries required for power. An adjustable knob allows for up to 93dB of amplified audio feedback from your device, and the speaker includes built-in overcurrent, short circuit, and overvoltage protection. As part of the GDS�� Ecosystem���, the speaker can be mounted to any GDS�� vehicle dock using the RAM�� short bracket adapter or RAM�� standard bracket adapter. Each bracket includes hardware to mount the speaker to the bracket, as well as the bracket to your GDS�� vehicle dock.