Now with the RF45 Advanced Remote Sonar Sensor you get even more performance. 120 feet depth capability 500 hours of in-water use Water surface temperature readings Light for night fishing to see where you've cast Programmable A/B channel operation...fish with a buddy without crossing signals Product : HUMMINBIRD SMARTCAST RF45 REMOTE SONAR SENSOR Manufacturer : HUMMINBIRD Manufacturer Part No : 710182-1 UPC : 082324506741