Measures quickly and accurately pulse rate and SpO2 blood oxygen saturation of arterial hemoglobin levelsUser can see Pulse Rate bar graph in this LED displayLight and compact, you only need to put your finger in the fingertip pulse oximeter testing chamber, the result will be shownThe product's housing use ABS material, the fingertip clip use silica gel material, is soft and easy to applyThere is a screen protector on the glass which may be removed before use. You may see some scratches which are only present on the plastic removable screen protector.

The YK-81C is a compact, fingertip pulse oximeter manufactured by Yonker (Xuzhou Yongkang Electronic Technology Co., Ltd.). It's designed for spot-checking blood oxygen saturation (SpO₂) and pulse rate in hospital, clinic, or home settings. The device features a dual-color OLED display, multiple display modes, adjustable brightness, and low power operation making it a convenient tool for routine monitoring or telehealth.