For example: set T1=8.88, the controller counts down at 0.01s, T2=8.8.8, the controller counts down at 1 minute. Working setting: 6 working modes for users to set. Long press the setting to enter the P-0 parameter, and set the required working by pressing the or minus on the current User's Guide: This product has 4 buttons, button button minus, set button, stop or start button. There are two sets of time and T2 for users to set Time range: automatically the range. The default range is seconds. Decrease the number to 0, continue to press the button to decrease, the range will automatically to 99.9s; add the number to continue to press the button to increase, the range will automatically to 0.0.0 Firstly set the time, T1=4.05 T2=0.1.0 Secondly set the working P-3, it will be automatically memorized 5s after setting, and start to run The number format is as follows: X.X X---time range 0.01s; X X.X---time range 0.1s; X X X---time range 1s; X.X.X---time range 1min, Manufacturer: SkyPOOU