Mechanical Timer: Large dial with clear scale; Quartz movement starts automatically 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, prolongs service life. Transparent design has no effect on viewing the dial. Wide Use: For street lamps, ventilation, fountains, advertising signs, production equipment, broadcasting and television equipment and more. For use in dry indoor locations only. Note: The data are all measured manually, please allow an error of 1-3 cm. Due to differences in light and display, there may be some color differences, please refer to the actual item received.