The programmable mechanical timer makes your life smarter and more convenient. DIN rail installation, easy to install. Features: Mechanical timer: Large dial with clear scale; Quartz movement automatically starts within a few minutes after power on. Easy operation: 24-hour timer, with manual switch, supports program timing (automatically turns on/off according to 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, extend the service life. Transparent design has no effect on viewing the dial. Widely used: For street lamps, ventilation, fountains, advertising signs, production equipment, broadcasting and television equipment and more. Only for use in dry indoor locations. Note: 1. Installation should only be carried out by a qualified electrician. 2. Please read the user manual carefully before use. 3. The size and color may be slightly different due to manual measurement and different lighting conditions. Thank you for your understanding. Specifications: Model, Voltage: SUL181h, AC110-230V/SUL181h, DC12V/SUL181d, AC110-230V/SUL180a, AC220-240V (optional) Material: ABS Built-in Battery: 1.2V 40mAh NI-MH Battery SUL181h: AC110-230V/DC 12V Color: Gray Contact Capacity: 16A Power: 2W Frequency: 45-60Hz (AC110-230V) Time Range: 24H Minimum Interval: 30min Setting Time: 30min/time, 48 times Reserve: 150H Contact Resistance: 50m Insulation Resistance: 100m Item Size: 54 * 68 * 110mm / 2.13 * 3.13 * 4.33in 2.68 * 4.33 inch Package size: 11.5 * 7.5 * 6 cm / 4.53 * 2.95 * 2.36 inch Package weight: 192 g / 6.77 oz SUL181d, AC110-230V: Color: White or Gray (sent randomly) Power: 1W Frequency: 50-60 Hz Switching capacity: 16 A, 250 V~, cos =1; 4 A, 250 V~, cos =0.6 Incandescent lamp load: 1100 W Time range: 24H Minimum interval: 15 min Setting time: 15 min/hour, 96 times Reserve: 200H (230V); 100H (110V) Item Size: 54 * 65 * 90mm / 2.13 * 2.56 * 3.54in Package Size: 9.8 * 7 * 6cm / 3.86 * 2.76 * 2.36in Package Weight: 135g / 4.76oz SUL180a, AC220-240V: Color: Gray Contact Capacity: 16A Power: 1W Frequency: 50-60Hz Load: 1000W Incandescent Lamp; 150W Energy Saving Lamp Time Range: 24H Minimum Interval: 15 min Setting Time: 15 min/time, 96 times Reserve: 72H Contact Resistance: 50m Insulation Resistance: 100m Item Size: 18 * 65 * 90mm / 0.71 * 2.56 * 3.54in Package Size: 9.8 * 7 * 2cm / 3.86 * 2.76 * 0.79in Package Weight: 85g / 2.98oz Package List: 1 * Timer Switch 1 * User Manual (English)