I just needed power supply. I lost mine. The used one I bought was as good as new. Tried it works fine. Both units (all?) seem to have issues with RF noise interfering with unit reading pacemaker. Nature of the beast. But hey Excellent value works fine....
This basically is a very good product if it is used in the way it is designed to be used. Therein is the problem, its use is very restrictive in terms of who receives the messages it sends to a cardiologist. To explain, these days we often have more than one place we would like the information to be sent, but it is not possible with this Latitude device. Nor, can you have two Latitudes with each sending to a different receiver. One Latitude and one receiver works fine. But, if you want two receivers to get the information you are out of luck.
My wife has to have this monitor for her pacemaker. Our cats chewed through the cord so I got on eBay and was surprised to find the exact same model with the item I needed ending the next day. When I received it I found it worked perfectly and solved the problem.