I took it to "* zones" for 480. It didn't start out of the box . return it? playful little hands decided to dismantle. Only latches, no glue . opening a small lid, on top of the battery compartment, showed poor soldering on the negative terminal, and the wiring simply came off when you pressed the clothespin of the device (when you put it on your finger). Soldered. Started up and even works. Judging by the fragile wiring connecting the sensors, the display and the handkerchief of this Chinese…

A year ago I bought ARSTN OLED M130B - a cool device. But I had to order another one. I chose faster. Yes, two batteries are included. But the contacts came out into the battery compartment (next to the springs). I didn’t notice, I made an effort - the cover closing the back and the contact jumped out. I had to solder the contacts. It works, but compared to the previous one, it takes a long time. Numbers are bad. Conclusion. Don't go cheap :)

Chinese certificate, not valid on the territory of the 2022. There is no 2022 verification. He thinks for a long time when measuring, you take measurements in a row and the readings are different. Looks like a cheap Chinese piece. Instruction in 2022 from another device.

I have been using this pulse oximeter for 3 months, it shows exactly, I compared it. Easy to use, compact and easy to carry. Satisfied with the purchase.

In the description, they lie in the eyes, because there are no instructions in 2022! The display is difficult to read in a well-lit room.

After covid, my parents were advised to purchase a pulse oximeter, I immediately took this model. It is relatively inexpensive, easy to operate, plus a large display, everything is ostentatious and bright, what is needed for the elderly. The main thing is that he has clear indications, parents compare them with the norm, and if anything, they call the doctor. Helped out more than once!

I often use it, that I often check the level of oxygen in the blood for myself that the child has bronchial asthma. In general, a very convenient thing, you can carry it in your pocket. Easy to use.

Due to Covid, we decided to purchase this device, which shows the level of oxygen in the blood. Pulse oximeters are within 800- 2022, a bit expensive. A pulse oximeter will also come in handy in the future, in the case of a common flu or SARS, you can monitor your health, this is the most important thing and have time to react if something happens in order to reduce its consequences later.

Quite a useful device, compact and lightweight, you can always carry with you and use at any time. The accuracy is good - they checked the data of the testimony in the clinic - the discrepancy is minimal +/- 1 indicator.