Use this BOXYM YONKER oFit-2 Pulse Oximeter to easily check your blood oxygen saturation levels and pulse rate. Ideal for anyone who wants to monitor their health at home or on the go. It's lightweight and compact, making it easy to carry with you. The advanced dual OLED display provides clear and sharp readings, and the four-direction display allows you to view the results from any angle. Simply place your finger in the tested chamber, and you'll get accurate results in just 8 seconds. It's powered by 2 x 1.5V AAA batteries (not included). The pulse oximeter also features sound alerts for pulse detection and irregular conditions. With a measurement accuracy of ±1BPM or ±1% of the measured value (whichever is larger), and a pulse rate measuring range of 30BPM - 240BPM, you can trust the readings. It operates in a temperature range of 5℃ - 40℃ and can be stored between -10℃ - 40℃. The ambient humidity should be between 15% - 80% when working and 10% - 80% for storage. Atmospheric pressure range is 86kpa - 106kpa. Comes with an English manual, English packaging box, lanyard, and blister lining.