The 150T-15 & 150T-110 from Weinschel by Spectrum Control is a RF Variable Attenuator with Frequency DC to 18 GHz, Attenuation Range 125 dB, Attenuation Step 1 dB, Power 180 W, Insertion Loss 5.25 dB. Tags: Benchtop, Programmable, Digital, USB Controlled, Computer Controlled. More details for 150T-15 & 150T-110 can be seen below.