The KT109 from KCB Solutions is a RF Variable Attenuator with Frequency 20 MHz to 3.2 GHz, Attenuation Range 0.25 to 31.75 dB, Attenuation Step 0.25 dB, Attenuation Accuracy ±0.15 to 0.25 dB, Power 0.25 W. Tags: Surface Mount, Digital. More details for KT109 can be seen below.