This is a really serious seller. The goods are very well packed with original packing and the shipment is really very fast. Only 10 days to Switzerland ! The oxymeter I choosed is the one you can sleep with. It's really a very good product. The adapter for my Samsung S10 is included. There are instructions you can follow. You only have to install an App on your smartphone and then to choose the mode USB and connect the oxymeter and start. And it starts ! It's really very good. The results are correct compared to another product. It's a very good product ! I recommend seller and goods and give 5 stars of course !
Perfect and as described