The NWT Honeywell RTH5100B Digital Non-Programmable Thermostat is a white rectangular-shaped device made of plastic, designed for wall-mounting. It operates on a corded electric power source and requires 2 AAA batteries for its sensor technology, which includes temperature sensors. This thermostat from the brand Honeywell is compatible with central air conditioners and offers adjustable thermostat settings for controlling heating, cooling, and off settings. Manufactured in 2009 in Mexico, it is a low voltage device with digital control style, perfect for maintaining optimal indoor temperatures. Mercury Free Battery System New sealed