If you require any additional information prior to purchase, please email us. This system is sold AS IS/WHERE IS as we cannot guarantee clinical functionality. We do, however, offer a 10-day no D.O.A. money back guarantee, which provides you with protection that our products are as described. Returned items must arrive in the same condition as sent, and must be shipped within 10 days of receipt. Prior notification of returns required. The cost of shipment to and from our facility is not refundable! A Release of Liability agreement must be signed and returned. Shipping/Packaging/Insurance cost will be added to the purchase amount at our cost. Canadian shipments are subject to appropriate taxes. Visit our website at www.labprobiomedical.com for other items for sale!