You can use the timer to turn on/off any electrical equipment at a preset time. 16 on/off programs per day, with 15 combinations available for a week. 24-hour, 7-day programmable settings. Built-in battery backup saves memory and retains programmed settings during power outages. Automatic time error correction of +/- 30 seconds per week. Repeat programs with 16 on/off settings; manual on/off control available. Easy-to-read LCD display with LED indicators. This multipurpose 7-day programmable timer switch offers five functions: 1. Clock display 2. Timer 3. Countdown 4. Automatic time error correction, weekly 5. Sleep mode. The TM618 timer module features a 1.598-inch large LCD display and can automatically control various electrical devices and power circuits according to preset times. Suitable for applications such as streetlights, lighting (signs), household appliances, and broadcast equipment. The digital timer switch includes a rechargeable battery (1.2V/40mA) and a high-accuracy CMOS chip for strong anti-interference performance and reliable operation. 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 items listed are included; other products are not included. Note: Lighting and display differences may cause slight color variations between the image and the actual item. Measurement may vary by +/- 1-3 cm.