1. You can use the timer to turn ON/OFF any electrical equipment with a preset timer. 2. 16 ON/OFF programs per day, 15 combinations to a week. Programmable 24 hours/7 days a week. 3. Built-in battery for memory backup (save the programs you set) in case of power failure. Automatic time error correction +/- 30 seconds, weekly. 4. Repeat programs with 16 on/off settings, and manual on/off setting. Easy-to-read LCD display, LED indicators. MULTIPURPOSE 7 PROGRAMMABLE TIMER SWITCH HAS FIVE FUNCTIONS: 1. CLOCK DISPLAY 2. TIMER 3. COUNTDOWN 4. AUTOMATIC CORRECTION OF TIME DEVIATION, WEEKLY 5. SLEEP MODE: The TM618 timer module (1.598 inch large LCD screen) can automatically open or close various types of electrical appliances and power, depending on the preset time. The items can be street lights, lights (sign), electrical appliances, broadcasting equipment, etc. The digital timer switch is available in a rechargeable battery, in 1.2V/40Ma, high-precision CMOS chip, strong anti-jamming, easy to use. Size: 7.0 cm x 7.0 cm x 4.0 cm Material: ABS+electronic components Color: white Package contents: 1 x TM618N-4 switch 1 x User manual Only 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 allowed measurement error is +/- 1-3 cm.