There are many kinds of micro-switches, hundreds of internal structures, according to the volume of ordinary, small, ultra-small; according to the protective performance, there are waterproof, dust-proof, explosion-proof; according to the break-off form, there are single-connected, double-connected, multi-connected. There is also a strong disconnect micro-switch (when the switch reed does not work, the external force can also make the switch off) ; according to the breaking capacity, there are ordinary type, DC type, micro-current type, large current type. According to the operating environment, there are common type, high temperature resistant type (250 °C) , ultra high temperature resistant ceramic type (400 °C) micro-switch generally without auxiliary pressing accessories as the basic type, and derived small stroke, large stroke. According to the needs of different accessories can be added to press accessories switch can be divided into button type, reed roller type, Lever Roller Type, short arm type, long arm type and other forms. In size there are small, ultra-small, ultra-small and so on. Functionally, it's waterproof. The most common application is the mouse button.