VEGA CETEC MODEL 66 RECEIVER... ( 4)9 volt batteries needed. I don't have so can't test.. Knobs seem to work.. The back battery cover is loose. One knob is missing. _______________________________________________________________________________________________________ Abay Electronics is your one-stop source for hard to find electronic components and industrial instrumentation. We have been a source of new and used lab equipment and instruments for the past 14 years. Many of our Customers appreciate the quality, level of service and professionalism that we offer. Lets us prove it to you. Please utilize our search feature or view our listings. We offer a full range of new and refurbished medical and industrial instruments. Most of our items were recently used in a working environment! We are extremely aggressive with pricing. Why pay retail??? Please check out our inventory tab at the top of the page. We only offer the top quality in used and refurbished equipment! We are not a representative of any manufacturer listed; all names, logos, descriptions and other related information are trademarks of their respected companies or manufacturers. All items listed are identified as either new or used and the new may be older surplus. We list all items to the best of our ability and aim to provide the customer with as much information as possible. Yaba1957 is not liable for any products sold, the customer is responsible for proper testing, installation and use of equipment purchased. No warranties are expressed or implied.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. ABAY ELECTRONICS 24124 PRODUCTION CIRCLE BONITA SPRINGS, FL 34135 PH# 239-834-7194