You can use the timer to turn on/off any electrical equipment at a preset time. 16 on/off programs per day, with up to 15 combinations set for a week. Fully programmable for 24 hours, 7 days a week. Built-in battery backup saves memory and retains your settings during power outages. Automatic time error correction within +/- 30 seconds weekly. Repeat programs with 16 on/off settings; manual on/off control available. Features an easy-to-read LCD display and LED indicators. MULTIPURPOSE 7-DAY PROGRAMMABLE TIMER SWITCH WITH FIVE FUNCTIONS: 1. Clock Display 2. Timer 3. Countdown 4. Automatic Time Error Correction, Weekly 5. Sleep Mode Usage: The TM618 timer module, featuring a 1.598-inch large LCD display, can automatically turn on or off various electrical devices according to preset times. Suitable for streetlights, neon signs, household appliances, broadcast equipment, and more. This digital timer switch includes a rechargeable battery (1.2V/40mAh) and a high-accuracy CMOS chip, offering strong anti-interference performance and reliable operation. Easy to install and 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 Note: Light and screen differences may cause slight variations in color between the product image and the actual item. Measurement allows an error of +/- 1-3 cm.