1.You can use the timer to SWITCH ON/OFF any electrical equipments at a preset timer2.16 ON/OFF programs per day, 15 combinations to a week. 24 hours / 7 a week programmable.3. Built-in battery for backup the memory (save the programs you set)when power failure4. Auto time error correction +/- 30 sec, weekly5. Repeat programs with 16 on/off settings, and setting on/off manually, Easy to read LCD display, LED indicators.MULTIPURPOSE 7 PROGRMMALBE TIMER SWITCH HAS FIVE FUNCTIONS:1. CLOCK DISPLAY2. TIMER3. COUNTDOWN4. AUTO TIME DEFLECTION CORRECTION, WEEKLY5. SLEEP MODEUsage:The TM618 timer MODULE (1.598INCH big LCD display) can open or close kinds of electrical apparatus and power automatically, according to the preset time, the items can be streetlight, 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.size:7.0 cm x 7.0 cm x 4.0 cmMaterial:ABS+electronic componentscolour:whitePackage Contents:1 x TM618N-4 switch1 x User ManualOnly the above package content, other products are not included.Note: Light 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.