Features: - AUTO/BOAT ADAPTER, NOT AC ADAPTER - Works with Inogen One external battery charger for Inogen oxygen concentrator (check picture 2) - EXTRA LONG DC power cord for easier access to more space - Compact and lightweight - Protection from short circuit and over temperature; consumes less power and has a smart LED power indicator - Ruggedized case withstands harsh mobile environments; tight sealing for protection against moisture and high humidity - Elbow plug tip reduces stress on the connector and protects the device power jack and adapter Specifications: - Input: DC 12 - 24V - Dimensions: 4.33" x 1.69" x 1.18" - Weight: 9.7 oz - Color: Black Note: This adapter is not original, it is a replacement made by iTEKIRO. It comes with a 30-day money back guarantee and 1-year replacement warranty.