Programmable countdown timers for time switches that let you schedule when connected devices turn on and off automatically Durable ABS shell with conductivity copper internal components for reliable performance and long life Wall mount design for easy installation beside appliances and in utility areas Suitable for a wide range of electrical appliances including fans, water heaters, pumps, routers, fish tanks, lamps, and other devices The timer switches operate according to the programmed time settings and stop automatically when the cycle ends Use scenarios Automate a fan to run during hot periods without manual switching Schedule a water heater or pump to operate at designated times for convenience or energy planning Control aquarium lighting and equipment for fish tanks or automate room lighting to simulate occupancy Notes The description reflects programmable countdown functionality, automatic on off operation, and compatibility with common household devices Built to provide reliable performance with a durable housing and conductive internal materials while remaining easy to install in a wall mount setup