The QMC-CRYOATTARY-20 from Quantum Microwave is a RF Variable Attenuator with Frequency DC to 12 GHz, Attenuation Range 0, 3, 6, 10, and 20 dB, Attenuation Accuracy ±0.5 dB, Power 0.1 W, Insertion Loss Less than 1 dB. Tags: Module with Connectors, Temperature Variable. More details for QMC-CRYOATTARY-20 can be seen below.