The 38M3-15A from ARRA Inc. is a RF Variable Attenuator with Frequency 1.2 to 1.4 GHz, Attenuation Range 15 dB, Attenuation Accuracy ±1.25 dB, Power 5 W, Peak Power 64.77 dBm. Tags: Module with Connectors, Continuously Variable, Rotary, Motorized. More details for 38M3-15A can be seen below.