＊Brand new, unused item (tested once) ＊Instant purchase and silent purchase are welcome 【Non-medical, non-pulse oximeter】 ◆Easy to measure! Insert batteries (two AAA batteries, please prepare separately), press the button, and simply insert your finger to take a measurement. ※Please pay attention to the battery orientation. Align the positive (+) end of one battery with the spring side. ※A protective film is attached to the screen, which may make it look scratched, but the inside is clean. If you are concerned, please peel off the film before use. ※There is no box. Everything in the first photo is included. ※The main unit will be wrapped in bubble wrap and placed in a thick envelope for postal delivery. This is not a medical device. Home blood oxygen saturation monitor Heart rate measurement is also possible, but it is only a reference value. For mountain climbing, walking, trekking, and other sports. Oxygen measurement Oxygen monitoring