Using this dispenser is a breeze. Just insert one or two quarters (US or Canadian) into the single - coin slot. Then press the button to get your sanitary product. If you change your mind, use the push - button coin return. Wrong coins will land in the product tray. When the dispenser is empty, the coin slot will be blocked automatically. For maintenance, keep the dispenser clean with a soft cloth. Check the coin box regularly and empty it when needed. The door locks can be opened with the corresponding keys. If you want to change the price from 25¢ to 50¢, it can be done easily in the field. And if you're using it in a school, order the free vend conversion kit (part No 3706 - 250) to meet the requirements.