The MMC-SP4T-00518-80 from Mesa Microwave is a RF Switch with Frequency 500 MHz to 18 GHz, Insertion Loss 3.8 dB, Isolation 80 dB, Power 23 dBm, Power 0.2 W. Tags: Module with Connectors, Solid State. More details for MMC-SP4T-00518-80 can be seen below.