You can use the timer to SWITCH ON/OFF any electrical equipments at a preset timer 16 ON/OFF programs per day, 15 combinations to a week. 24 hours / a week programmable. Built-in battery for backup the memory (save the programs you set)when power failure Auto time error correction +/- 30 sec, weekly Repeat programs with 16 on/off settings, and setting on/off manually Easy to read LCD display, LED indicators Countdown OFF time range 1 minute to 24 hours MULTIPURPOSE PROGRMMALBE TIMER SWITCH HAS FIVE FUNCTIONS: 1. CLOCK DISPLAY (12/24hr FORMAT) 2. TIMER ( PROGRAMMABLE) 3. COUNTDOWN 4. AUTO TIME DEFLECTION CORRECTION, WEEKLY 5. SLEEP MODE Usage: The TM618 timer MODULE can open or close kinds of electrical apparatus and power automatically, according to the preset time,the items can be streetlight, neon light (sign), , electrical appliances, broadcast equipments etc., the digital timer switch is within rechargeable battery, in 1.2V/40Ma, high-accuracy CMOS chip, strongly anti-jamming, easy to use. Why choose TM618N? 1. 1.6 inch big LCD display,easy to read. 2. Excellent load capacity, 16amp@250vac. 3. Easy program. Colour:White Material:plastic Package Contents: 4 x Timer Switch Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.