1.[High Precision]: This programmable switch has a very small switching error, it can control the time from 1 minute to 168 hours, and it can be configured with up to 16 groups of switching times per day, making it easy and quick to use 2.[LCD Display]: The modular clock has a clear and simple LCD display. It includes a clock correction/calibration function and a key lock function to prevent misuse 3.[Material]: The programmable switch is made of flame retardant ABS, insulated against electric shock, flame retardant, stable, safe and durable 4.[Installation]: The timer complies with the 35mm DIN rail mounting standard and can retain historical data even when the power is off. The QR code on the panel allows users to easily access the English user manual 5.[Application]: The pool timer can automatically turn on or off all kinds of electrical appliances at a fixed time, which is suitable for applications such as scheduled charging of electric vehicles, lighting control of billboards and shops, garden irrigation, scheduled pumping and draining, etc.