This works ok, the massage is just vibration, so it is ofc somewhat limited, but it does work well for what it is. The AC/DC adapter is woefully under powered, at 1A 12v keeping in mind that the voltage drops as the power draw increases. I had this connected to a bench power supply, originally at 12.9v and 1.2A. With the heater on, and on some programs, the power supply went into over current protection, I eventually bumped the voltage up to 14.4v and the current limit at 1.6, I still saw peaks over