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. - cis2:mm5mnJlm -Specifications: Type: Speakers; Box Dimensions: 5"H x 9"W x 9"L WT: 1.4 lbs; UPC: 753759205546;