Tjernlund Interlock With Manual Speed ControlCan be electrically interlocked with virtually any burner control circuit. Features include: Adjustable pre/post purge timing and LED status/fault lights and manual speed control. Interlocks single 24/120 VAC burner. For additional heaters add MAC-series multiple appliance controllers. Product Specifications BRANDTjernlund LENGTH INCHES9 WIDTH INCHES6 HEIGHT INCHES3 WEIGHT LBS.4 CONSTRUCTIONGalvanized Steel VOLTAGE120 HERTZ (HZ)60 CERTIFICATIONSETL MANUFACTURER'S PART NUMBERUCRT