24 hour programmable thermostat - For use in hard-wired systems - Up to 6 time and temperature events each day - Battery powered for ease of installation - Many user overrides, including thermostat and frost protection mode. The TP4000 is an easy-to-use, 24 hour, programmable room thermostat providing different temperatures at different times of day. Combining the functions of a timeswitch and room thermostat into one unit the TP4000 provides up to six time and temperature events each day.