1PCS NI / National Instruments NI PXI-2556 2.5 GHZ Dual 4x1 75 Multiplexer USEDCondition Used Seller Notes An item that has been used previously. The item may have some signs of cosmetic wear, but is fully Brand National Instruments Model National Instruments NI 9422 MPN Does Not Apply UPC Does not apply Product Description Product appearance: 80% 99% New Functional test: Normal We have 4 units of 1PCS NI National Instruments NI PXI 2556 2. 5 GHZ Dual 4x1 75 Multiplexer USED. Pictures shown are for reference; we ship randomly.