Time Delay Relay; Type AC Operated, Adjustable; Contact Voltage Rating 18 to 30 Volt AC at 50/60 Hertz; Contact Current Rating 1 Amp; Timing Range 12 to 390 Second; Timing Mode Post-Purge Fan Delay; Timing Adjustment Operator Type Knob; Approval UL; Overall Dimension 2 Inch Length x 3 Inch Width x 1.25 Height