This is one used HP 33325-60001 with option 5VDC, DC - 50GHz 60dB Programmable 50 Ohm Digital Attenuator, with 2.4mm female connectors. Serial Number: 33325-60001. I have no method to test it, the condition of the unit look like new (unused), unit without product label on one side to cover the screw heads. I sell this unit as used (actually untested), but if for any reason not work, I will take it back and full refund (return shipping will be refund too).