Product Description You can use the timer to turn any electrical appliance on/off at preset times. Up to 16 on/off programs can be set daily, and up to 15 combinations can be set weekly. Fully programmable 24/7. Built-in backup battery saves settings and retains data during power outages. Automatic weekly time error correction within ±30 seconds. 16 repeating on/off programs can be set; manual control is also available. Equipped with an easy-to-read LCD display and LED indicators. Multi-functional 7-day programmable timer switch with five functions: 1. Clock display 2. Timer 3. Countdown 4. Automatic time error correction weekly 5. Sleep mode Applications: The TM618 timer module is equipped with a large 1.598-inch LCD display and can automatically turn connected electrical appliances on or off according to preset times. Suitable for applications such as streetlights, neon lights, home appliances, and broadcast equipment. This digital timer switch features a built-in rechargeable battery (1.2V/40mA) and a high-precision CMOS chip, providing strong anti-interference capabilities. It is simple and easy to operate. Dimensions: 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: Due to differences in lighting and screen display, the color of the product shown in the picture may be slightly different from the actual product. Measurement error is +/- 1-3 cm.