Item Type: Mechanical Time Switch Material: PC flame retardant Model: SL-189 Working Voltage: AC220V Drive Type: Quartz motor type Period: 24 hours Minimum Setting Unit: 15 minutes Package List 1 x Mechanical Time Switch 1 x Manual 1EXCELLENT CHIP: The industrial timer adopts upgraded time control chip, with low energy consumption and accurate time control ability. 2EASY READING: Clock design, can be read directly, you can confirm the current time more easily and accurately, with minute adjustment button. 3FLAME RETARDANT SHELL : Using PC flame retardant shell, which is corrosion resistance, safer for electricity use. 4PROTECTIVE COVER: Transparent waterproof and dustproof cover can effectively prevent water and dust from entering, ensures safety. 5WIDE APPLICATION: This timer switch is widely used in state grid, transformer substation, mall supermarket, home residence, etc.