The K4-3-LIS/28P from MCLI is a RF Switch with Frequency DC to 4 GHz, Insertion Loss 0.25 dB, Supply Voltage 28 V, Supply Current 110 mA, Actuator Voltage 28 Vdc. Tags: Module with Connectors, Electro-Mechanical. More details for K4-3-LIS/28P can be seen below.