If you just want to see depth readings to 200', water and air temperature, the D10D In-Dash Sounder is for you.Todays high-tech, multipurpose fishfinders are designed to produce a range of readings from bottom contour, fish location, and thermoclines, to a variety of other useful sonar data. However, the technology used to decipher between these different signals coupled with the configuration of their specialized transducers greatly reduces their ability to give instant bottom readings.The D10D Digital Depth Sounder is engineered to give precise depth readings from 2.5' to 200', at speeds up to 63mph. Say goodbye to the days of not knowing the depth while running your boat on plane. Includes interchangeable black and white bezels and face plates.The D10DX incorporates dual temperature displays. A simple press of a button gives instant access to water or air temperature readings via integrated sensors in both the transducer and head unit. This model includes a transom-mount transducer.Key FeaturesDisplay Type: Backlighted LCD with LED alarmMaximum Depth: 200'Controls: Two sealed buttonsDimensions: 2"dia. x 3 3/8"DMounting Hole Size: 2 1/8"dia.Draw: 40mA@12V DCNMEA Interface: NoneAlarms: Audible and visible upper and lower depthWarranty: Two years