1,Frequency range:9k-13GHz (the signal link should not contain DC); 2,Maximum input power:30DBM(1W);. 3, input and output impedance: 50 Ohm; 4, input and output interfaces: 26.5G clipboard SMA female; 5, external size: about 5 x 5cm; 6, CNC attenuation core board: the default purchase of the core board alone for the parallel port mode, and the main control board when purchased as a whole set of SPI serial port mode; 7, specific insertion loss and error view S11 and S21 curve. Color: As shown Material: Metal Please note: the physical slightly color difference or difference, does not affect the use, please do not mind, thank you Package Contents: 1 x Digital Programmable Attenuator Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.