Faria 2" Dual Depth Sounder w-Air Water Temp Transom Mount Transducer - Chesapeake SS Black 
2" Dual Depth Sounder with Air & Water Temp Transom Mount Transducer - Chesapeake SS Black
The Depth Sounders from Faria offer a 3-199 foot (61m) depth capability, with an automatic gain control, backlighting for maximum night vision, keel offset, and deep and shallow water alarms.
Depth can be read in meters, and feet. With its oversized back-lit display depth can be easily read in any condition. Audible and Visual alarms let the boater know when a shallow or deep water condition exist. A programmable keel offset lets you adjust the offset from the keel at the display.
- Chesapeake SS Black
Quick Guide (pdf)