The RLV3120A Digital Non-Programmable Thermostat is designed for line volt heating systems including electric baseboard heaters and convectors (2 wires). This line volt thermostat for electric heat features a compact design and minimum load that are ideal for controlling small baseboards with 200W minimum load. Additional features include precise temperature control of +/- 0.15˚ Celsius, 100% silent TRIAC switching for quiet operation, and a slim, compact design that makes it ideal for installation in small spaces. Plus, it has a 2-wire non-polarized connection for fast, hassle-free installation and is mercury free.