This is a new, vintage Tandy Computer Products serial port adapter, Model No. 26-287. It converts a Female DB25 serial connection to a Male DB9 serial connection, ideal for connecting older peripherals to newer systems or vice-versa. The adapter is shielded and grounded for reliable data transmission, as indicated on the original packaging. Perfect for collectors, enthusiasts, or anyone needing to bridge legacy serial port standards. Comes in its original, unopened blister packaging.