You can use the timer to turn any electrical equipment ON/OFF at a preset timer 16 ON/OFF programs per day, 15 combinations per week. Programmable 24/7. Built-in battery to back up memory (save the programs you set) in case of a power outage Automatic time error correction +/- 30 sec, weekly Repeat programs with 16 on/off settings and manual on/off setting Easy-to-read LCD display, LED indicators Countdown OFF time range from 1 minute to 24 hours VERSATILE 7-DAY TIMER SWITCH WITH FIVE FUNCTIONS: 1. CLOCK DISPLAY (12/24H FORMAT) 2. TIMER (7 DAYS PROGRAMMABLE) 3. COUNTDOWN 4. AUTOMATIC TIME DEVIATION CORRECTION, WEEKLY 5. SLEEP MODE Usage: TM618 timer module can open or close kinds of electrical appliances and power automatically, according to the preset time, the items can be street lamps, neon lights (signs), billboards, electrical appliances, broadcasting equipment, etc., the digital timer switch is in a rechargeable battery, in 1.2V/40Ma, high-precision CMOS chip, strongly