Grassmaster: Solid-state keeps working under demanding fishing conditions finding grass. Backlit LCD. Dual Function Surface and Water Temperature Gauge: Readings from -20º to 120ºF. In-dash mounting into 2" hole. Backlit LCD display. 36" Power cable. 10-16V DC required.Depth Sounder: 600' maximum depth. Mounts in standard 2-1/8" dash opening. Totally automatic. Backlit. Adjustable bottom alarm. Information in feet, meters and fathoms. Includes shallow alarm, deep alarm and keel offset.