1. quality materials: The mini LCD digital timer features an optimized copper foil structure, ensuring extended durability. This quality construction enables efficient and reliable operation over long periods. 2. Builtin battery: This programmable digital timer includes a builtin battery that retains settings for up to 60 days, even when powered off. This eliminates the need for frequent reprogramming, offering convenience and ease of use. 3. performance: Equipped with a microcomputer chip and LCD screen, the timer provides precise timing, simple operation, accuracy, industrialgrade quality, and strong interference resistance. This guarantees outstanding performance and reliability across various environments and applications. 4. LCD display: The programmable time relay switch boasts a large LCD display for easy adjustment and operation monitoring. It operates in temperatures ranging from 20 to 55°C and supports up to 17 daily or weekly settings. Programming options range from 1 minute to 168 hours, ensuring flexibility for diverse needs.