The Simrad Depth/Speed/Temperature Smart Multisensor together with Airmar's CAST App, is the convergence of advanced hull data, matched with a simple and reliable way to calibrate accurate speed via a wireless device. This changes how boaters receive and deliver information to get greater performance from their hull. It is a simple, consistent way to calibrate speed-through-water regardless of what display system is on board. The DST810 and Airmar CAST App deliver capabilities that until now, were only available through expensive PC based software.• Mounting Location: Transom Mount• Depth: 4000 Feet• Frequency Range: 42 To 65 kHz Low Frequency Dual Channel CHIRP/ 30 To 210 kHz High Frequency Dual Channel CHIRP• Supported Angle: 6 To 25 Degree Transom Angle Up To 330 Foot Maximum Depth 235 kHZ Frequency 20 Foot Length | Simrad Depth/Speed/Temperature Smart Multisensor Transducer