Blackt Electrotech 16A/240V AC Digital LCD Display Programmable Control Counter/Time Timer Relay Switch: DIN Rail Type: This timer switch could automatic turn on/off all kinds of electric equipment according to the time user set. It has a built-in rechargeable battery and an industrial grade chip with high precision and strong anti-interference ability, the timer switch is great for controlling street lamps, neon lamps, production equipment, radio and television and many other home appliances. Package Includes: 1 x Timer Switch, 1 x User Manual. Specifications: Contact Voltage Rating: 16A 240V AC (50/60Hz), On/Off Operation: 16 on and 16 off (manual/auto), Display: LCD Power: 4.5VA (max), Error: =2s/day (25), Mounting Method: DIN rail (not included),Bound: 1 min to 168 hours, Operating Temperature: -10? To 55?, Size: 86 x 36 x 65mm / 3.38 x 1.41 x 2.56 inches.Instruction: 1. When you use the timer switch for the first time, input AC and charge the inbuilt battery please, then press reset button.2. The timer switch is at 24-hour mode as default. Press and hold time button (bottom left, next to reset) for 5 seconds till it display AM to set to 12-hour mode. Press and hold again time button for 5 seconds to set back to 24-hour mode. 3. Full time clock setting (see more at User manual).