Review on Pulse oximeter on a finger Fingertip Pulse Oximeter LK87 measurement of oxygen and pulse. by gnes Bdi (Bdi gnes) ᠌

One thing is the same, if there is gel polish on the nails, the device does not read the information, there are dashes on the screen. With its pros: Pluses for delivery and service, for the device itself I can put only 3 stars. Cons: Batteries are not included although the description says they are included. The polarity of the batteries is reversed. Where a minus is indicated, there should actually be a plus.