This is a portable espresso machine. Please note that it does not have a heating function. I am selling this because I found out that I need to boil water after purchasing and charging it. It's practically new, but since I charged it, I've listed the product condition as "Like New." Q: Does it have a heating function? A: The [PCM01] does not have a heating function. Hot water is required. Q: What kind of ground coffee can I use? Can I use anything? A: You can use any ground coffee. Please use your preferred type. We recommend using ground coffee with a coarseness similar to salt. Q: What kind of capsules can I use? A: It is compatible with popular capsule coffees, and capsules can be easily purchased on Amazon or at electronics retailers. We recommend using capsules of about 5.5g. Q: Is there a problem with its strength or safety if I carry it around? A: The tank part is made of stainless steel and is sturdy. The cup is robust and designed to withstand high temperatures. Q: How many times can I use it on a single full charge? A: PCM01: Approximately 150 extractions are possible with hot water. *The PCM01 does not have a heating function. Q: Can I wash it in the dishwasher? A: Yes! It can be easily disassembled, so you can wash it immediately with detergent. All parts, except the main body, can be washed in the dishwasher.