Menu operation, support 5 customized languages: English, Spanish, Russian, French, Portuguese. Abundant software:Abdomen, Obstetric, Gynecology, Cardiac, Urological and other part measurement. Back-lit silica gel keyboard, photoelectric trackball and encoder, easy to operate. 10 grades depth adjustment under full visual field, maximum display depth:236mm. Display mode:B,2B,4B,B/M,M. Internal eight pseudo colors (incl.B/W), optional color LCD monitor. 100 frames permanent storage, 256 frames cine loop. Two USB ports support large capacity U disk (support document management/software upgrades/one-key storage), and color laser printer directly print various images and reports.