TECHNICAL DATA: Voltage tating: 220VAC Custom order Voltage :12V, 24V, 36V, 48V, 110,220V Hysteresis: 2 sec/day ON/OFF operation:16 ON/OFF Display: LCD Minimum interval: 1 minute Switching contact:1 changeover switch Power reserve: 3 years Ambient temperature:-10~+40C Ambient humidity: 35~85 RH Expansion Set times: 16 times switch (day / week) Setting time: 1 minute to 168 hours Travel time error: 1s/24h Power failure memory: 60 days (built-in 1.2V rechargeable battery) Dimensions: 60x60x32mm Installed by the way: screw connector connection (plus 72x72mm panel enclosure can be installed by) How to use ? Step Key Programming 1 Press P Setting1 ON time(display 1on) 2 Press H+/M+ Setting hours and minutes 3 Press D+ To select same every day,or different time each day 4 Press P Setting 1 off time (display 1 off) 5 Press H+/M+ Setting hours and minutes turn off time 6 Press D+ If you want the same every day, you need not press this key 7 Repeat step2-6 Set 2-17 on/off time 8 Press end