This is a miniature sub-miniature microswitch from the Toneluck group, which was founded in 1976. It is SPST NO type with a metal lever and solder terminal. Meanwhile, the electrical rating is 1~50mA/5~16VDC, which is certificated by UL, ENEC, CQC, and so on. The MQS-9B is a long-life micro switch, for example, the mechanical cycle is 500000cycle.
Besides, the actuator and the switch structure are sealed with a waterproof function. So, it can work in a wet working environment.