The DDTO-480/1215-20 from Shanghai Huaxiang Computer Communication Engineering is a Dual Directional Coupler with Coupling 20 dB, Coupling Variation 1.2 dB, Frequency 480 MHz to 1.215 GHz, Average Power 400 W, Insertion Loss 0.6 dB. Tags: Module with Connectors. More details for DDTO-480/1215-20 can be seen below.