Minn Kota's Fisherman's Temperature Sensor provides information on water and air temperature. The unit measures the water temperature from -58 to 158 degrees and the air temperature from 23 to 122 degrees. It comes with a submersible probe on a 23-foot cord and a built-in clock and can store temperature ranges. The large, backlit LCD is easy to read and the case is simple to mount. Powered by a AAA battery, the Temperature Sensor sells for $16. Minn Kota; (800) 661-9086; www.minnkotamotors.com.