The DDTO-2500/2700-10 from Shanghai Huaxiang Computer Communication Engineering is a Dual Directional Coupler with Coupling 10 dB, Coupling Variation 0.5 dB, Frequency 2.5 to 2.7 GHz, Average Power 50 W, Insertion Loss 1.4 dB. Tags: Module with Connectors. More details for DDTO-2500/2700-10 can be seen below.