External 20W power supply, designed specifically compatible with AirMini Series CPAP Machines 38002 38831 38839 38828. Simply connect the charger to your AirMini, then plug the other end into a suitable 100-240V wall outlet. Compatible with ResMed AirMini AutoSet AirSense Air Mini Travel CPAP Device Input voltage range of AC 100-240V allows for use in different countries and regions, Output current of DC 24V 0.83A for efficient power conversion. Only compatible with the ✅ResMed AirMini✅, Not compatible with ❌ResMed Airsense 9 S9❌, Not compatible with ❌ResMed Airsense 10 S10❌, Not compatible with ❌ResMed Airsense 11 S11❌,Not compatible with ❌Philips dreamstation❌, Not compatible with ❌Philips system one 60 Series❌ and others. ⚠️⚠️⚠️This charger is only compatible with the Airmini travel CPAP machine and cannot be used in the Airsense 11. Please note the difference between the Resmed Airmini charger and Resmed Airsense 11 charger. While they may look similar, the connectors are different and not interchangeable. Please carefully check the charger's connector to ensure you are purchasing the correct one. Certified Safety: Our charger is UL/CE/FCC/RoHS certified and designed with OVP, OCP, and SCP protection to ensure superior performance, reliability, and safety. These mechanisms protect against over-voltage, over-current, and short-circuit, ensuring the safety of your device against power fluctuations. 5-Years Warranty: We offer a 60-monthss warranty and a 90-days money-back guarantee. If you have any concerns or questions about your order or the product, contact us for comprehensive after-sales service. We're committed to providing the highest standard of customer service and ensuring you have a hassle-free shopping experience. This is the replacement 20W power supply (AC adapter) compatible with the AirMini Travel Device. The power supply is what is required to plug your AirMini into a wall outlet so that you can power the machine from an AC power source.