The 2853-10 A from ARRA Inc. is a RF Variable Attenuator with Frequency 860 to 900 MHz, Attenuation Range 10 dB, Attenuation Accuracy ±0.25 dB, Power 5 W, Peak Power 64.77 dBm. Tags: Module with Connectors, Continuously Variable, Rotary. More details for 2853-10 A can be seen below.