Using this product is simple. Just approach the towel dispenser and the intuitive light will show you where to activate the towel. When the towels run out, the automatic transfer feature will start using the stub roll. To empty the waste receptacle, unlock it from the cabinet and remove the front panel. You can power the unit with an AC adapter or 4 Alkaline 'D' Cells, but remember the cells aren't included. For maintenance, regularly wipe the satin - finish stainless steel with a soft cloth to keep it looking good. Avoid using abrasive cleaners that could scratch the surface. If you want to change the type of dispenser or receptacle, the field conversion process is easy and you won't need to replace the existing wall cabinets.