Accessory Type Programmable Radiator Controller, Compatible with Product Type Standard Radiator Valves, Includes Adapter(s), Base Plate, Batteries, Controller, Display Holder, Screws, Pipe Connection Type Threaded, Temperature Range 32 Degrees F to 122 Degrees F, Material ABS, Model Number HR90, Overall Height 2 3/8 in, Overall Width 2 1/8 in, Overall Depth 3 13/16 in, Standards RoHS , CE