PRODUCT INFORMATION: Fingertip oximeters are used to measure human hemoglobin saturation (the saturation of the protein found in human red blood cells that carries oxygen to the tissues). This product is comfortable and suitable for a wide range of uses at home, in hospitals (internal medicine - chest diseases - surgery - anesthesia - pediatrics - physical therapy), oxygen bars, social medical organizations, sports centers (before and after sports activities). PRODUCT FEATURES: 1. Product use is simple and easily understandable. 2. The product is small, lightweight (50 g including batteries) and easy to carry. 3. The product consumes low power and can operate continuously for 30 hours with 2 AA batteries. 4. When the battery power is too low to support normal operation, a low power warning will appear in the display window. 5. The product automatically shuts down in 8 seconds when not in use.