1. Power On/Off
2. Touch panel
3. Rotary controls
4. User Define keys (include BT Keys)
5. Pointer key
6. Clear key
7. Comment key
8. Trackball/Trackball Keys
9. Measure key
10. B Mode/Gain
11. Left/Right key
12. Depth/Zoom
13. AO
14. Freeze key
15. P1 (Print) key