Using the Bradley 2494 paper towel dispenser is a breeze. Simply place your hand at a natural position below the dispenser, and it'll automatically dispense the towels. You can adjust the sheet length to your preference with up to three different sizes. It runs on 4 'D' alkaline batteries, but remember, the batteries aren't included. When the primary roll is nearly depleted, the stub roll transfer system will start working, so you don't have to worry about running out of towels suddenly. Before installation, make sure to verify all rough - in dimensions. Use the convenient mounting slots to secure it to the wall and use the appropriate mounting devices provided by the installer. This model can fit inside Model 2271 to create a multi - purpose cabinet. To keep it in good condition, regularly check the battery level using the low - battery indicator and replace the batteries when needed. The transfer system, roll holders, and door are field - replaceable, so if something breaks, you can easily swap them out. And because it complies with FCC regulations on EMC, you can trust its performance.