Does just what it is suppose to. It is easy to use and good quality for the price. OLED screen is really nice! Glad it takes normal 'AAA' batteries. buy some rechargeable batteries if you use it a lot and save some money. Other wise I would think the batteries it comes with would last a long time if you just use it a couple times a day. The only complaint I would have is the font-size for the Perfusion Index or PI is a little small. Besides that it is a very nice monitor.
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