Note:This DC Adapter is just for ✓Inogen One G2 G3 G4 Portable Oxygen Concentrator, ?NOT for Inogen One G2 G3 G4 External Battrery Charger. Not Compatible with inogen one g5 ? and BA-503 ? charger. (Please Note that this item Compatible with a number of different Models Number, Please Make sure Your Model or PN: Match this Listing. Compatible with Inogen One G2 Portable Oxygen Concentrator, Inogen One G3 Portable Oxygen Concentrator, Inogen One G4 Portable Oxygen Concentrator, Inogen One Portable Oxygen Concentrator.ONLY Compatible with Model: MANGO100-19B MANGO10019B MANGO 100-19B Replacement for INOGEN CATALOG# BA-301 BA301 1400-1040 14DD-1040 OXYGO CONCENTRATOR;CATALOG# BA-301, model# MANGO100-19B Replacement for INOGEN Inc. Input: DC12V-24V (9-32V DC Max) Output: 19V 6.32A 120W; Total Cable Length 2.6M , OVP, OCP, SCP Protection (OVP: Over Voltage output Protection. OCP: Over Current output Protection. SCP: Short Circuit output Protection). Tested Units. In Great Working Condition. KFD products are CE / FCC / RoHS certified,Warranty: 30 Days Free Exchange /36 Months Warranty.