We are a used medical equipment wholesaler. We do not service or refurbish any of the items that we sell and this item is sold in used working condition, guaranteed not to arrive DOA. We do not offer or imply any extended guarantees or warranties on any equipment sold unless otherwise stated. It is the responsibility of the buyer to ensure that all equipment is thoroughly inspected and certified by qualified technicians prior to patient use.  Seller assumes no liability for this item once it has been certified and used in a clinical setting.  eBay requires the following language for all medical equipment listings: "The sale of this item may be subject to regulation by the U.S. Food and Drug Administration and state and local regulatory agencies. If so, do not bid on this item unless you are an authorized purchaser. If the item is subject to FDA regulation, I will verify your status as an authorized purchaser of this item before shipping of the item."