Using this paper towel dispenser is easy. Just wave your hand near the sensor, and the intuitive LED light will guide you to the towel activation zone. The dispenser will then automatically dispense a towel for you. When it comes to installation, you can choose to mount it on the surface easily. You have the option to power it with an AC adapter or 4 Alkaline 'D' Cells (not included). For supply, you can use any universal roll as it has universal roll compatibility. To adjust the sheet length and dispensing intervals, you can use the adjustable settings. As for maintenance, keep the dispenser clean with a soft cloth. If you're using batteries, replace them regularly to ensure proper functioning. Also, make sure to refill the paper towel roll when it's running low.