The 4953-30 from ARRA Inc. is a RF Variable Attenuator with Frequency 2 to 2.4 GHz, Attenuation Range 30 dB, Attenuation Accuracy ±0.3 dB, Power 1 W, Insertion Loss 3.5 dB. Tags: Module with Connectors, Rotary, Continuously Variable. More details for 4953-30 can be seen below.