The popping chamber is made of food grade aluminum alloy and the surface is made of BPA free and durable thermal conduct ABS with scratch and bump resistance. Its one-key operation makes it very easy to operate as you just need to add kernels into the popping chamber in order to get crispy delicious popcorn in no time. Also, the popcorn once prepared falls into the bowl directly. For Maximum Efficiency Use new kernels as the old ones may have dried up. Always store kernels in a sealed container at room temperature rather than a refrigerator to maintain constant moisture. Keep a check on the wiring and fan of the popper to ensure its functioning properly. Never add flavoring while the popping process is active, always add once the process is complete.Never point the outlet at people or pets when recently used. Switch off the machine when the popping process is over, wait for 1 minute before opening the chute. Have a 5 minute gap between batches. The popper automatically shuts off when the temperature reaches 365° F.