[Hand Operated] The portable espresso unit is manual and does not require batteries, USB charging or electrical outlets. [Easy to install] Add water boiling water to your water tank. Then use a plunger to inject water into the coffee adapter. After several presses, the optimum extraction pressure is reached and a strong espresso is drawn out. [Convenient] will put a smile on your face when you receive the first drop of espresso from this small coffee maker. < p>[Easy to carry] Small and compact in size, the product can be put in a backpack, handbag or luggage, etc. [Great gift] It is a great gift for coffee lovers on the go who want an espresso anywhere, anytime.