Hướng dẫn sử dụng Máy đo nồng độ oxy đầu ngón tay LPOW A340
LPOW A340 Fingertip Pulse Oximeter Operation quick guide This device is intended for noninvasive spot-checking your blood oxygen saturation levels and pulse rate. Install two AAA batteries into the battery compartment according to the indicated polarity + /-. Insert one…