Oxygenmachinevip:  Valentine's Day Offer 18% OFF  Save $232  Serene5  The VARON Serene 5  delivers medical-grade oxygen at 93±3% concentration with a flow rate adjustable from 0.5 to 5L/min. It's ideal for continuous 24/7 use, offering whisper-quiet operation (?43dB) and includes a 2-in-1 nebulizer for additional respiratory support.