【 programmable】Advanced preset one week in advance. Digital electronic timer switch with daily programs. Repeat programs with 17 on/off settings and manual override. 【AC/DC 】Lithium battery power reserve when power is off. AC/DC power available. 【automatic error correction】This timer has automatic error correction +30sec, weekly. With high precision and strong anti-interference ability, 【easy to assemble】This timer adopted panel mounted design, can be mounted on the wall easily and firmly. 【Extended applications】This timer switch can automatically turn on/off all kinds of electrical equipment according to the time set by user. Suitable for controlling street lamps, neon lamps, production equipment, radio and television, and many other household appliances. Specifications: Input Voltage: 24 VAC/DC Rated Contact Voltage (Output): 220 V to 250 VAC 50/60 Hz Hysteresis: 2 s/day (25 °C) ON/OFF Operation: 17 ON/OFF Power: 7.5 VA (MAX) Display: LCD Minimum Interval: 1 minute Switch Contact: 1