The EQUL1P-4551-S5S5 from ETL Systems is a Gain Equalizer with Frequency 900 MHz to 1.5 GHz, Gain Equalization 3±0.3 dB, Insertion Loss 3 dB, Power 30 dBm (1 W), Voltage Supply 30 V. Tags: Module with Connectors, Positive Gain Slope. More details for EQUL1P-4551-S5S5 can be seen below.