How the Humminbird SmartCast RF 35 Works: * Just attach the Advanced Remote Sonar Sensor to your line and cast * Date and time function work independently of fish finder function * A wireless signal transmits real-time sonar views of fish, bottom and structure right to the wrist mount display * The action is always easy to see, whether you"re fishing or just scouting an area * You can quickly switch from one fishing spot to the next since there"s nothing to carry Key Features: * Full Function Watch with Time and Date Function * Pulse Backlit display for night fishing * Water Surface Temperature provided by New Advanced RSS * Light built into Advanced RSS for night fishing (user programmable to turn light off/on) * 100 foot depth capability with ultra-wide 90 degree sonar beam * One-touch menu navigation easily controls Fish ID, Depth Range, Fish Alarm, and Sensitivity * Remote Operating Range of up to 75 feet * Easy to see fully waterproof display * Display uses a 2450CR replaceable battery * Fully waterproof Advanced Remote Sonar Sensor typically lasts 500 hours of in-the-water usage * Wet Switch technology maximizes battery life by automatically shutting down when Remote Sonar Sensor is out of the water * New Advanced RSS is user-programmable to allow the angler to use the sensor in either Channel A or Channel B mode. * A/B Channel option allows use of two Remote Sonar Sensors at the same time with reduced interference Specifications: * Depth Capability: 120 ft * Display Matrix: 48 V x 32 H * Display Type:STN LCD * Sonar Frequency:125 kHz * Sonar Coverage:90 degrees * Wireless Operating Range:75 Feet * Temperature:Included