The QWSPNN from Qualwave is a RF Surge Protector with Frequency 0.8 to 6 GHz, Input Power 500 to 2500 W, Insertion Loss 0.2 dB, Operating Temperature -40 to 85 Degree C, Surge Current 20 to 30 kA. Tags: Quarter-Wave Shorting Stub (QWS). More details for QWSPNN can be seen below.