The BT-50K18 from American Microwave Corporation is a Bias Tee with Frequency 50 KHz to 18 GHz, Max. Voltage 15 V, Max Current 200 mA (0 to 0.02 A), Insertion Loss 0.75 to 1 dB, Isolation 60 dB. Tags: Module with Connector. More details for BT-50K18 can be seen below.