Programming1. Press the "+" and "-"button to set the desired time. 2. Each press increases/decreases 10 minutes, or 1 hour. 3. Set range: 10/20/30/40/50 mins and 1H, 2H,...to 24H. ex: "010" means 10 minutes, and 01H means 1 hour. 4. No need to set ON/OFF time, it will start to work once programmed and Auto-off after running the set time. 5. The LED display will always show the setting time, there is no power at "00H"6. Device will auto shut off and repeat every day. Note: The schedule will change if you hit any of the buttons even if the display time has not changed, but start time will.