This is a tiny switch on the overhead panel, next to the switch pilots use  to contact cabin attendants.

这是头顶面板上的一个小开关，旁边是飞行员用来联系机舱服务员的开关。

As a twin-engined aircraft, it has the capacity to transport up to 24 individuals, along with two crew members and a cabin attendant, depending on the customer's configuration.

作为一架双引擎飞机， 它最多可搭载 24 人，以及两名机组人员和一名客舱乘务员，具体取决于客户的配置。