programmable Advanced pre-setting one week before. Digital electronic timer switch with daily programs. Repeat programs with 17 on/off setting and manual over-ride. AC/DCLithium battery power reserve when electric supply cut off. AC/DC power available. auto error correctionThis timer has auto error correction +30sec,weekly. With high precision and strong anti-interference ability, easy to mountThis timer adopted panel mounted design, can be mount on the wall easily and tightly. wide applicationsThis timer switch could automatic turn on/off all kinds of electric equipment according to the time user set. Suit for controlling street lamps, neon lamps, production equipment, radio and television and many other home appliances. Specifications: Input Voltage: 24VAC/DC Contact Voltage Rating(Output): 220V to 250VAC 50/60Hz Hysteresis: 2 sec/day (25C) ON/OFF Operation: 17 ON/OFF Power: 7.5VA (MAX) Display: LCD Minimum Interval: 1 minute Switching contact: 1 changeover switch Power: Lithium battery Operating Temperature: -10C to +40 C Humidity: 35~85%RH Instruction: Step Button Programming 1 Press P Setting 1 ON time(display 1on) 2 Press H+/M+ Setting hours and minutes 3 Press D+ Select same every day, different every day, MO-FR, MO-SA, SA-SU, MO WE FR, TU TH SA, MO-WE, TH-SA.(lf same every day, no need to press this button) 4 Press P Setting 1 OFF time (display 1off) 5 Press H+/M+ Setting hours and minutes turn off time 6 Press D+ If you want the same setting every day, you need not press this button 7 Repeat step 2~6 Set 2-17 on/off time 8 Press "time" End If the setting is wrong, please press C/R to cancel or reset the programs. If all buttons are locked(no response), press and hold C/R for 8 seconds to unlock. If you do not need 17 on&off settings, press "time" to end. Package Includes: 1 x Timer Switch