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/ off automatically according to the schedule) and permanent ON/ 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/SUL181h, DC12V/SUL181d, AC110-230V/SUL180a, AC220-240V (Optional)Material: ABSBuilt-in Battery: 1.2V 40mAh NI-MH BatterySUL181h: AC110-230V/ DC 12VColor: GreyContact Capacity: 16APower: 2WFrequency: 45-60Hz (AC110-230V)Time Range: 24HMinimum Interval: 30minSetting Times: 30min/time, 48 timesReserve: 150HContact Resistance: 50mInsulation Resistance: 100mItem Size: 54 * 68 * 110mm / 2.13 * 2.68 * 4.33inPackage Size: 11.5 * 7.5 * 6cm / 4.53 * 2.95 * 2.36inPackage Weight: 192g / 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/time, 96 timesReserve: 200H (230V); 100H (110V)Item Size: 54 * 65 * 90mm / 2.13 * 2.56 * 3.54inPackage Size: 9.8 * 7 * 6cm / 3.86 * 2.76 * 2.36inPackage Weight: 135g / 4.76ozSUL180a, AC220-240V:Color: GreyContact Capacity: 16APower: 1WFrequency: 50-60HzLoad: Incandescent Lamp 1000W; Energy-saving Lamp 150WTime Range: 24HMinimum Interval: 15minSetting Times: 15min/time, 96 timesReserve: 72HContact Resistance: 50mInsulation Resistance: 100mItem Size: 18 * 65 * 90mm / 0.71 * 2.56 * 3.54inPackage Size: 9.8 * 7 * 2cm / 3.86 * 2.76 * 0.79inPackage Weight: 85g / 2.98ozPackage List:1 * Timer Switch1 * User Manual (English) Note: 1. Please allow 1-3 mm error due to manual measurement and 1-3g weight error make sure you don't mind before ordering. 2. Due to the lighting of the photos and the difference of monitors, the pictures may not reflect the actual color of the real item. Please make sure you don't mind before ordering, thank you! About Shipping: 1.please pay attention to your delivery address such as: name, street, house number, doorbell/email without name, etc. is correct, or the order will not be delivered correctly. 2.All items will be shipped within 3 business days after the payment is received. Most times you will receive them within 8-12 days then. The specific delivery time is depend on circumstances. 3.During the shopping process, if you have any questions, please feel free to consult us, we will reply you within 24 hours Hope you have a pleasant shopping experience!