Wall-mounted wired remote thermostat KJR-21B/D Suggested retail price 0-hrv. Find a Dealer Description Electronic wall mounted wired remote thermostat KJR-21B / D for the fan coil units, designed to regulate the room temperature by means of: ON / OFF 2 (3) way valve. on / off additional electric heater. change 4 fan speeds fan coil. There are hours and the display backlight in blue. Images Additional Instructions Manual or installing and operating the thermostat S400Wall-mounted wired thermostat S400Download2.24 MB