The 24HR/7D DIGITAL TMR 40A 120-277V Auto-Voltage Series 40 Amp Electronic Time Switch is a universal electronic control, which automatically detects the input voltage without the use of a DIP switch or selector pins. The time switch automatically selects any voltage between 120 VAC and 277 VAC. This time switch controls high amperage loads for lighting, HVACR, pumps, motors, fan controls, access controls, agricultural facilities, and general purpose electrical circuits. The mechanism is mounted in a compact Type 3R outdoor enclosure and features a DPDT Switching Configuration standard.