The new ANGEL-5S version is a SmartTouch multifunctional oxygen concentrator. It has been specially developed to provide a dependable, convenient source of supplemental oxygen for therapeutic needs. Includes Nebulizer function. Suitable for both children and adults, ANGEL-5S offers concentration up to 96%. Features 1. A Touch operate multi-functional units. 2. 5Liter with 93%�±3% oxygen purity output for COPD users 3. Oxygen Purity Display by Numbers ( Accuracy 00.0%) 4. Timer 5. Large 6' LED Light Display all functional data 6. Accumulated total running hours Special features only provided by AngelBiss Technology 1. The world's NO. 1 Oxygen Output Purity Fluctuation rate controlled within 0.1%. 2. Automatic heavy humidity remove molecular sieve 3. Independent Oxygen outlet & nebulizer outlet system 4. Child Lock settings 5. 3 years warranty or 18000 hours lifetime 6. Durable use for environment areas at high temperature (45�ºC), high altitude (4500m). Accessories 1 Humidified bottle 1 Outlet tube 2 Cannula 1 Nebulizer kit