The Altitude range adjustment mechanism of EM31 Pro is unique compared to others. Its innovative planar gear support structure enables rapid adjustment of the altitude angle from 0° to 90°. When locked, the two pairs of planar gears interlock each other, providing higher solid support than traditional friction-based locking structures. Moreover, the entire adjustment process requires no tools.

The optimized latitude fine-tuning mechanism allows for finer and more precise adjustments, while the ergonomic knobs ensure smoother operation.