Check the listing for details. Marconi 6500 Scalar Network Analyzer DC-126 GHz 3 Channel Programmable WORKS!. Condition: Used. Listed at 399.99 USD. GOOD WORKING CONDITION EXCEPT FOR A BROKEN #5 KEY The analyzer can be used with any Negative polarity crystal detector such as HP 8742 shown in the pics Can also be easily modified for use with HP, Wiltron, Pacific Measurements scalar detectors by wiring only 2 contacts (Signal and GND) (see pic). The 3rd wire is temperature compensation and only improves accuracy by small amount. ACCESSORIES: Operator manual on a CD, US power cord ATTENTION INTERNATIONAL eBAY buyers!!!!!!!!!!! This item will ship via eBay Global Shipping Program and if is delayed or lost outside the US you will need to resolve the problem directly with eBay Global Shipping. Seller has no control nor is receiving payment for the shipping of this item to the destinations outside the United States of America.