This adaptor is specifically designed for some special applications. The head of the mouse will be fixed by a pair of ear bars, nose, and incisors, and can be rotated according to the experimental requirements to facilitate the operation of different parts of the mouse head in different directions. The vertical adjustable range of the adaptor is 30mm (-20mm ~ +10mm), the adjustment accuracy is 100um; Horizontal adjustable range of the adaptor is 43.5mm; the rotation angle of the head is 60° (-30° ~ +30°)