The TEEF1-4001-B5B5 from ETL Systems is a Bias Tee with Frequency 50 MHZ to 2.8 GHz, Max. Voltage 28 V, Max Current 0.5 A, Power 37 dBm(5 W), Insertion Loss 1 to 1.4 dB. Tags: Module with Connector. More details for TEEF1-4001-B5B5 can be seen below.