Selling a Vivaguard (made in USA) blood pressure machine. I bought it from Bikroy.com 2-3 months ago, but it is currently just sitting at home. It is a functional machine; those who know, know that digital machines do not give 100% accurate results. There is always a slight margin of error. If digital machines gave accurate results, why wouldn't doctors use them? If you want to take it, you can measure it as much as you want to check. It requires 4 batteries to operate. I am selling it because I need the money.