Programmable mechanical timer switch makes you life smarter and more convenient. DIN rail installation, easy to install.Features:Mechanical Timer Switch: Large dial with clear scale quartz movement starts automatically in a few minutes after the power is switched on.Easy Operation: 24 hours timer, with manual switch, supports program timing (turn on or off automatically according to the schedule) and permanent ON or OFF. Built-in battery for reserve.DIN Rail Installation: Convenient to assemble and disassemble, flexible to use. Compact size and light weight make installation easier.Transparent Dust Cover: Dustproof and water-splash proof, prolongs service life. Transparent design has no effect on viewing the dial.Wide Use: For street lights, ventilation, fountains, advertising hoarding, production equipment, broadcasting and television equipment and more. Only for use in dry indoor places.Note:1. Installation should only be carried out by a qualified electrician.2. Please read the user manual carefully before use.3. Size and color may be slightly different due to manual measurement and different light conditions. Thanks for understanding.Specifications:Model, Voltage: SUL181h, AC110-230V or SUL181h, DC12V or SUL181d, AC110-230V or SUL180a, AC220-240V (Optional)Material: ABSBuilt-in Battery: 1.2V 40mAh NI-MH BatterySUL181h: AC110-230V or DC 12VColor: GreyContact Capacity: 16APower: 2WFrequency: 45-60Hz (AC110-230V)Time Range: 24HMinimum Interval: 30minSetting Times: 30min or time, 48 timesReserve: 150HContact Resistance: 50mInsulation Resistance: 100mItem Size: 54 x 68 x 110mm or 2.13 x 2.68 x 4.33inPackage Size: 11.5 x 7.5 x 6cm or 4.53 x 2.95 x 2.36inPackage Weight: 192g or 6.77ozSUL181d, AC110-230V:Color: White or Grey (Randomly Sent)Power: 1WFrequency: 50-60HzSwitching Capacity: 16A, 250V-, cos =1 4A, 250V-, cos =0.6Incandescent Lamp Load: 1100WTime Range: 24HMinimum Interval: 15minSetting Times: 15min or time, 96 timesReserve: 200H (230V) 100H (110V)Item Size: 54 x 65 x 90mm or 2.13 x 2.56 x 3.54inPackage Size: 9.8 x 7 x 6cm or 3.86 x 2.76 x 2.36inPackage Weight: 135g or 4.76ozSUL180a, AC220-240V:Color: GreyContact Capacity: 16APower: 1WFrequency: 50-60HzLoad: Incandescent Lamp 1000W Energy-saving Lamp 150WTime Range: 24HMinimum Interval: 15minSetting Times: 15min or time, 96 timesReserve: 72HContact Resistance: 50mInsulation Resistance: 100mItem Size: 18 x 65 x 90mm or 0.71 x 2.56 x 3.54inPackage Size: 9.8 x 7 x 2cm or 3.86 x 2.76 x 0.79inPackage Weight: 85g or 2.98ozPackage List:1 x Timer Switch1 x User Manual (English)