The UTF-040 from Teledyne Microwave Solutions is a RF Variable Attenuator with Frequency 10 to 1000 MHz, Attenuation Range 30 to 40 dB, Power 0.2 W, Insertion Loss 2.2 to 2.5 dB, Switching Time 0.4 ms. Tags: Module with Connectors, Drop In, Voltage Controlled. More details for UTF-040 can be seen below.