This presentation describes the specifications and parameters of the radar altimeter and scatterometer for China's Oceanic Dynamic Environment Mission (ODEM) (HY-2, Haiyang-2. "Haiyang" means ocean in Chinese). Some details about the design of these two instruments are also presented. The instrument on-board HY-2 includes a microwave imager (MWI), a dual-band radar altimeter (RA) and Ku-band radar scatterometer (SCAT).