The SunMed Percent-O2-Lock Entrainment Assembly is a revolutionary device designed to deliver optimal oxygenation levels with unparalleled precision and control. Its Percent-O2-Lock feature allows for exact setting of oxygen concentration, ensuring accurate delivery as prescribed by healthcare providers. The built-in oxygen flush valve enhances safety by providing quick access to high-flow oxygen in emergencies. The humidity cup promotes patient comfort by humidifying the delivered oxygen. The assembly's compatibility with various oxygen sources and its intuitive design make it versatile and easy to use. Its accuracy, safety features, patient comfort, versatility, and user-friendliness make it an indispensable tool for respiratory care in hospital, clinical, home healthcare, long-term care facilities, and emergency medical services. The SunMed Percent-O2-Lock Entrainment Assembly is the epitome of respiratory care, maximizing oxygen delivery while minimizing potential hazards and providing increased comfort and safety for patients.