SmartCast RF35 wrist mount provides a dual function fishfinder and watch with go anywhere design.SmartCast RF35 Features: Fully functional watch with date and time capability. High visibility 1 1/4 quot; diagonal display with 48V x 32H resolution. Water surface temperature and digital depth readout. 150 ft. remote operating range 120 ft. depth capability. Pulse backlit display and pulse lit Advanced Remote Sonar Sensor (RSS) for night fishing. Display powered by replaceable 1 Lithium 2450CR watch battery. (included) Includes dual channel and waterproof Advanced RSS Ultra-wide sonar coverage equal to twice the water depth. One-Touch menu navigation easily controls FishID+ depth range fish alarm and sensitivity. Advanced RSS typically lasts for 500 hours of in-the-water usage. Advanced RSS replacements available on this web site at your local tackle dealer and major outdoor retailers. Wet Switch technology maximizes battery life by automatically shutting down when the Advanced Remote Sonar Sensor is out of water. Waterproof design. Product : HUMMINBIRD SMARTCAST RF35 WRIST MOUNT W/ REMOTE SENSOR Manufacturer : HUMMINBIRD Manufacturer Part No : 406280-1 UPC : 082324029349