... mark(140 kinds for different parts), arrow.*Zoom: 10 ratio, 1.5, 2.0, 2.5, 3.0, 3.5, 4 ... :Ultrasound Box unit 1Convex Probe 1USB cable 1Power cable 1*Options:a) Transducers:Convex: R50, 2-5MHz, central frequency 3.5 MHz ... ;R60, 2-5MHz, central frequency 3.5MHz ;Micro-convex: R20, 2-5MHz, central frequency 3.0 MHz ;Linear : L40 ...