Menu features:1. Two USB ports (one for USB mouse, one for U disk)2. Save the picture to the U disk, or browse the pictures and videos in the U disk3. Crosshair: 1-12 groups, optional colors, adjustable size4. Freeze function: two split screen, four split screen5. Scale: The number of scale pixels in each interval can be adjusted arbitrarily6. Measurement function: the distance between two points, rectangle, circle, angle, etc.