The heartbeat dose environment ranges from just one to 6 LPM. In addition, it provides a ongoing location of one to 3 LPM for precision oxygen. The battery keeps both pulse dose mode chugging for approximately four hrs and as much as 1.five several hours functioning in the continual method. https://hotbookmarkings.com/story13972421/not-known-facts-about-oxygen-concentrator-10l