This was for a friend because the first one met my requirements and I recommended it. I have been using it for years without any problems.

Incredibly slow and problematic. The plug of the hose somehow just gets stuck in the socket, without "clicking" properly and effortlessly, like in other devices. If they didn't have the same logos on them, one would say that they (bracelet and device) are incompatible with each other! The large bracelet (the "regular" size was small for the patient's hand and had to be changed, with complaints from the pharmacist), takes an eternity to inflate and just as long to deflate, making the measurement torturous. However, even so, almost half of the measurements are invalid, resulting in starting the process all over again! The design and ergonomics are mediocre. The buttons are also small and difficult to use for the elderly. Unfortunately, one of the worst purchases I have ever made... I have kept it as a backup and rarely use it anymore.