O2-EASY is a finger pulse oximeter to check and monitor patient blood-oxygen saturation (SpO2) level and pulse rate. Its small, compact, simple, reliable and durable design greatly enhances patient care. It is widely used in different medical fields, such as home-care, clinics, hospitals, social medical organizations, first-aid, dental operation. Standard accessories included: 2 x AAA 1.5V alkaline batteries (replaceable), 1 x hang lace.