This new type of stereotactic device is oursSpecially designed for mice in the SR series, it features multiple special functions to secure the head. By using an auxiliary ear stick, the controller can smoothly clamp with one hand, and the operator can check the correctness of the external sound channel installation by feeling it with their fingertips. The design of the mouth and nose fixing pliers is thin and small, matching the mouth of a small mouse, making it easier to fix teeth. In addition, the device is easy to adjust in front/back and up/down positions. The 18.7mm bracket allows for the installation of various types of accessories on SM-15 equipment. There is an AP pole.