The DAT64L from DS Instruments is a RF Variable Attenuator with Frequency 1 MHz to 6 GHz, Attenuation Range 0 to 63 dB, IIP3 55 dBm, Insertion Loss 2 to 8 dB, Supply Voltage 4.75 to 5.2 V. Tags: Module with Connectors, Digital, Programmable, USB Controlled. More details for DAT64L can be seen below.