This is a portable device to measure SpO2 (blood’s oxygen saturation levels) for household and personal use. The measuring operation is easy and quick, you just need to place your inside the photoelectrical sensor and accurate measurements will be display on the screen. Suitable for all ages, choose one to have a good of the health of your families and yourself to the happening of some cardiovascular and cerebrovascular ! Features - Color: Black. - Material: Plastic. - Size: About 6x4x3cm/2.3x1.5x1.1inch - Powered by 2pcs AAA batteries (not included), low power consumption. - Accurately determine your SpO2 (blood oxygen saturation levels) andpulse , display it conveniently on its digital LED display - Small size and lightweight, convenient to carry - Perfect for mountain climbers, skiers, bikers or anyone interested in measuring their SpO2 and . - Suitable for the hospital,oxygen bar,sport health (using them before or ,do not advising using them during the movement),and community ,etc. Package list: 1 x