Yes, the machine has enough suction.and if your machine doesn't release suction, try the following:firstly ,you need to check whether the hose connection is firm, you can choose a higher level of adsorption mode appropriately, if you need to perform a long suction then you can choose to turn off the red button on the top right side, there will be a large suction power for a long time Adsorption;second,Your setup has suction time and release time, Check that your release time is longer than your suction time. Times should be equal to or the suction time can be a little longer than the release time;last, Try changing the positioning of the Cups & adjust the suction levels on your machine，if that doesn’t work, you can try tying of one side of the tubing to check how well the suction is with just one cup.if you have any question in use,feel free to contact us and we will reach you at the soonest.
Hi! The voice is normal when working, not harsh. In order to bring customers a better product experience, our vacuum therapy machine has been updated with bigger suction and less noise, which is better than most of cupping therapy sets on amazon.
We have 220v and 110v plugs for your choice.
Yes, there is instruction in the product packaging, please follow the instructions. If you have any questions, feel free to contact us and we will reach you at the soonest.