a small device that you can press, for example to count, record, or control something, or to make a small sound

Security guards use hand clickers to count people as they leave the museum. 当人们离开博物馆时，保安用手动计数器来记录人数。

Find the clicker and change the channel. 找到遥控器，然后换台。

To train the animal, you must click a clicker a few times at the exact moment the pet is performing the correct action. 为了训练动物，宠物执行正确动作的时刻你必须及时点按几下遥控装置。