The 2853-158 from ARRA Inc. is a RF Variable Attenuator with Frequency 820 to 980 MHz, Attenuation Range 15 dB, Attenuation Accuracy ±0.75 dB, Power 5 W, Peak Power 64.77 dBm. Tags: Module with Connectors, Continuously Variable, Rotary. More details for 2853-158 can be seen below.