Quantic PMI Model ATN-30-100M40G-USB is a state-of-the-art attenuator that operates from 0.1 to 40 GHz that is controlled and powered via USB 2.0 and offers 30 dB of attenuation in 1 dB steps. The insertion loss is typically 5 dB at 20 GHz and 8 dB at 40 GHz. Easy driver installation, simply download and run the Quantic PMI USB Software application from any windows computer. Compatible with Windows XP to 11. Package size is 2.25" x 1.0" x 0.33" with standard USB Type A and 2.92mm female connectors.