The 2-3953-30Y from ARRA Inc. is a RF Variable Attenuator with Frequency 700 MHz to 1.4 GHz, Attenuation Range 30 dB, Attenuation Accuracy ±1.5 dB, Power 1 W, Insertion Loss 3.5 dB. Tags: Module with Connectors, Rotary, Continuously Variable. More details for 2-3953-30Y can be seen below.