The QVA-500-18000-20-S from Qualwave is a RF Variable Attenuator with Frequency 0.5 to 18 GHz, Attenuation Range 0 to 20 dB, Insertion Loss 3 dB, Supply Voltage 0 to 5 V, Operating Temperature -40 to 65 Degree C. Tags: Module with Connectors, Voltage Controlled. More details for QVA-500-18000-20-S can be seen below.