Let me explain that a mercenary's wristband is different from other active items (flare guns, wands, etc.). ) When you press it, it is in the starting state. During this time, as long as your item cd is ready and touches the wall, it will be triggered actively. If you press the item logo again, it will be dimmed, which means it will be closed. If you touch the wall in the closed state, the item effect will not be triggered.

For example, this is the most commonly used wall-touching catapult for general mercenaries, which can realize the functions of starting the accelerated transfer and pulling away the distance in the open place without a window. The principle is simple. You touch the wall obliquely to trigger the wristband, usually at an angle of about 45 degrees. The judgment of the catapult is about 90 degrees after you touch the wall.