Want a budget LED with sun rise and sun set function? Now you can buy our smart controller and convert your normal LED (must with constant voltage transformer) into a programmable LED light. And you can have sun rise & sun set straight away just like magic. This controller works with all our Chihiros LED and other LED in our store under 36V and 100W. Caution: If you are not using this device with LED from our store, You must make sure your LED is running with a constant voltage AC/DC adapter before purchase. Please consult your supplier whether your LED is constant voltage. Feature 8 programs, set 8 different light intensity at 8 different time during the day. 0-100% adjustment on each setting. Built-in clock - you can set intensity change at your preferred time. Power disconnected memory - your setting will remain in the device even power disconnected, and it will resume the setting once you connect the power again. Easy to use, simply take the controller out from box, and connect it between the LED light and the AC/DC adapter. Difference between S2 and S2-Pro is the way the change intensity (Please refer to our last photo. S2: Change intensity in Steps. S2-Pro: Change intensity linear over time and imitate real sunrise and sunset in reality) Connector: DC5.5 (you need to make sure your fitting is using this connector). Area of use Plant tank and fish tank - Simulate sunrise and sunset for the day, less algae problem with longer lighting period. Arowana (Dragon Fish) Tank - Can leave 1-3% moon light through the night, less stress on fish and less chance of hitting itself onto tank glass. Cooling fan - can act as time and adjust fan power according to temperature change during the day (in general temperature is highest during ~12-4pm, and temperature is lower in the evening) DC water pump - can control DC circulating pump to simulate different current during the day in nature Instruction ON/OFF Short press to turn on and off Long press to go into clock setting, use +/- to adjust hour and mins, then press Menu to exit MIN/L+ - Increase intensity % HOUR/L- - Decrease intensity % MODE Short press to change mode, Long press goes into program setting NO-1 & Time flash, use +/- to adjust 1st program, then press M L000 flash, use +/- to adjust intensity for 1st program, then press M to next NO-2 & Time flash, then repeat the process to complete all 8 programs Caution: If display shown "--:--" mean the setting do not recognise. Display L00*/Time rotate - it is working at particular setting AUTO/Time rotate - it is running the programs automatically, device default is AUTO, it goes in to AUTO mode once you connect to power.