The DDTO-800/2500-30 from Shanghai Huaxiang Computer Communication Engineering is a Dual Directional Coupler with Coupling 30 dB, Frequency 800 MHz to 2.5 GHz, Average Power 200 W, Insertion Loss 0.4 dB, Directivity 20 dB. Tags: Module with Connectors. More details for DDTO-800/2500-30 can be seen below.