The QVA-18000-40000-30-K from Qualwave is a RF Variable Attenuator with Frequency 18 to 40 GHz, Attenuation Range 0 to 30 dB, Insertion Loss 6 dB, Supply Voltage 0 to 10 V. Tags: Voltage Controlled. More details for QVA-18000-40000-30-K can be seen below.