Usage Tips:SinoTimer TM615 DIN rail 7 days 24hrs Programmable switch timer can automatically switch on and switch off various kinds of electric equipment at a preset time. It is widely used in 7 days programmable control of streetlight, neon light (sign), lamp, water heater, air conditioner, billboard, electric cooker, booster, sprayer, bottler, preheater, agriculture facilities and broadcasting equipment etc. The digital timer switch is within replaceable battery CR2032, to save the programs for power failiure. it has the features of low consumption, high-accuracy CMOS chip, strongly anti-jamming, simple and easy to set Item Features: Perfect for household use in pannel mounted 3500 Watt / 16 Amps, 1NO+1NC. Or 30A/ 5000W 24 hours / 7 days a week programmable Replaceable Battery for saving the memory when power failure Auto time error correction +/- 30 sec, weekly Repeat programs with 16 on/off settings, and setting on/off manually Colour:White Material:ABS+electronic components Size:9.0 x 4.0 x 7.0 cm Package Contents: 1 x Timer 1 x User Manual Only the above package content, other products are not included. Note: Light shooting 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.