The NDTS300 from Shanghai Huaxiang Computer Communication Engineering is a Fixed Attenuator with Frequency DC to 4 GHz, Attenuation 3 to 40 dB, Power 300 W, Peak Power 10 kW, Weight DC-2 : 350 g, DC-4 : 450 g. Tags: Module with Connectors. More details for NDTS300 can be seen below.