Transcend Micro 510 Travel CPAP – Certified Pre-OwnedThe Transcend Micro 510 Certified Pre Owned is the newest generation 0. 48 lb auto adjusting travel CPAP, professionally inspected, sanitized, and resold with a 1 year Sleeplay warranty at a lower price than new. The new 510 machine delivers the same 420 cmHO auto pressure, FAA approved airline use, AirMist waterless humidification, and MySleepDash app tracking as a brand new unit. Best for travelers who want the 510's upgrades (quieter WhisperSoft