... : Dynamic receiving focusl DFS: Dynamic frequency scanning, frequency range: 2.0-12.0MHz, 4 kinds of scaning frequenciesAdvantagesl ... , up/down, left/right and black/white conversationl Dynamic Range: 100Db, 4 steps of switchesl Image magnification, stepless magnification ... clew system, image fore-set and one-key optimization functionsl Auto-measure software of OB., Gyn., small organs, cardiac, urology ...