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 the memory (save the programs you set)when power failure4. Auto time error correction +/- 30 sec, weekly5. Repeat programs with 16 on/off , and setting on/off manually, Easy to read LCD display, LED indicators.MULTIPURPOSE 7 PROGRMMALBE TIMER SWITCH HAS 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 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 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.