Cannot delete. Because off stands for compensator. Otherwise, the error caused by the total station cannot be corrected. At the beginning of design, this is fixed in time and cannot be deleted by users. Guangzhou Nantianyu CTS-632R6 prism-free total station, product features:

1, prism-free ranging, reliable accuracy guarantee.

2. Absolute coding angle measurement.

3. Backlit plastic keyboard.

4. All-digital and subtitle keyboard, 2.7-inch display, 4 lines of Chinese display, and adjustable display brightness.