At first glance, exactly what I thought I'd get and what I wanted. I bought 3 and quickly noticed that the readings vary from one to another more than I expected, for the O2 and sometimes even for the pulse which surprised me. I'm going to speculate that my fingers all have the same pulse when they are measured at the same time.I like the visual indication of a pulse, and it works pretty well on healthy people with strong pulses. However not so well on my elderly Mom, especially when she isn't feeling well. It's often very difficult to get a reading from someone that is having problems, which is when I think it's needed most. I was often force to increase the pressure and move it around a lot go to get it to work at all. When my Mom's saturation is low she needs oxygen and I can't tell if it won't get a reading.I can't say if other sensors are any better., I just don't know.
Rating: [4 of 5 Stars!]