Active SpeakerConnect your compatible VHF radio to a handset for on-board communication. The active speaker has a knob to adjust volume up or down as needed on the compatible handset.WARNING: This product can expose you to chemicals which are known to the State of California to cause cancer, birth defects or other reproductive harm. For more information go to P65Warnings.ca.gov. Specifications:Type: SpeakersBox Dimensions: 4″H x 8″W x 8″L WT: 1.57 lbsUPC: 753759205546