The TEEF1-4001-B7B7 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 1.2 to 1.6 dB. Tags: Module with Connector. More details for TEEF1-4001-B7B7 can be seen below.