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.