Model BT-55-401S is a wideband bias tee. RF cover 20 KHz to 85 GHz. Insertion loss is 3.0 dB typical and isolation is 30 dB. Voltage handling is 25 Vdc and current is 500mA. VSWR is 2.00:1. Small housing of 1.42 x 0.60 x 0.50” with 1.85mm female connectors. Applicable for powering remote antenna amplifiers and photodiodes.