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 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, extends service life. Transparent design has no effect on viewing the dial. Wide Use: For street lamps, ventilation, fountains, billboards, 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.