Unit Includes The Following: Igo2 Concentrator One Battery (with One Year Warranty) Ac Power Adapter Dc Power Adapter Carry Case Carry Strap User Manual Settings 1-5 Pulse Dose Smartdose Auto-adjusting Conserver Technology Included Rugged Design Including Protective Overmold Weighs Less Than 5 Lbs Most Sensitive Conserver Trigger On The Poc Market 8.4 (h) X 3.5 (w) X 8.6 (l) Portable Oxygen Concentrator Igo Family Battery Duration 3.5 Hours @ Setting 2 Oxygen Purity 90% +4/-3 Over Entire Operating Range Sound Level 37db Warranty Drive Devilbiss Warrants This Equipment To Be Free From Defects In Workmanship And Materials For Five (5) Years From Date Of Factory Shipment To The Original Purchaser (typically The Healthcare Provider) With The Exceptions Of The Compressor (warranted For 3 Years) Sieve Beds (warranted For 1 Year) And Battery (warranted For 1 Year). The Carry Case Is Excluded From This Warranty. These Warranties Are Limited To The Buyer Of New Equipment Purchased Directly From Drive Devilbiss Or One Of Its Providers Distributors Or Agents. Drive Devilbiss? Obligation Under This Warranty Is Limited To Product Repair (parts And Labor) At Its Factory Or At An Authorized Service Center. Routine Maintenance Items Such As Filters Are Not Covered Under This Warranty Nor Does It Cover Normal Wear And Tear Hcpcs E1390 + E1392