The PerfectSense™ PS800 Series Line Voltage Thermostats offer performance and accuracy in an easy to install, low voltage control with models available for 120/208/240/277 Volts. The PS800 Series is J-Box compatible allowing it to be mounted directly to a 2" x 4" vertical electrical outlet box to speed up installation time. The simple modern design mounts flush to the wall, with a large knob for easy temperature adjustments.