Longfian 10-liter signal flow oxygen concentrator price in Bangladesh. Alarm: 1. Power failure alarm; 2. High and low pressure alarm; 3. Low oxygen concentration alarm. Features: ✧ With medical-grade oxygen concentration above 90%, better treatment effect for patients with pulmonary fibrosis; ✧ Innovative cooling technology to ensure 24/7/365 operation; ✧ Humidifier bottle with a pressure relief value of 6PSI, safer and more comfortable; ✧ Four flexible castors with two brakes, easy to move or situate in any direction, safer and more convenient; ✧ Simple operation functions and easy-to-read LCD Display; ✧ Apply for HFNC, provide oxygen with stable high concentration, more comfortable; Home delivery, setup support, and 24/7 customer support.