It belongs to the panel manual control switch, with intuitive operation, and is a commonly used switch in electronic devices. According to the number of poles, it can be divided into unipolar, bipolar, three-stage, and multipole types. According to the operating mode, it can be divided into ordinary type and locked type. According to the contact state of the contacts, it can be divided into normally on type and instantaneous on type; According to the usage environment, products are divided into non sealed, panel sealed, button handle sealed, fully sealed, etc. Currently owned KN1、KN1A、KN3、KN4A、KN5A、KN6A、KN6J、KN12、KND2、KNE5、KNE6、KNE8、KNE9、KHB5、KHB6、KHB7、KHB8 Waiting for over 30 series.