The Humminbird Transom Speed & Temp Sensor 730000-1 TS-W is a black model that is designed to be installed on the transom of a boat. This sensor is capable of measuring both the speed and temperature of the water, making it a useful tool for fishing enthusiasts who want to accurately track their boat's speed and monitor water temperature levels. Additionally, it is important to note that this product carries a California Prop 65 Warning due to its potential to contain chemicals that may cause cancer and birth defects. This item is brand new without box and is a Retired Discontinued item.