This is an electronic part made by Dailywell. It is a 4MS1R102M1QES with rocker switches through hole RoHS. It has one-pole, one-throw (SPST) contacts, with silver-cadmium oxide contacts. The housing is made of thermoplastic material, and it is flame resistant to UL94V-0 standard. It has a maximum electrical life of 50,000 cycles, and is compliant with RoHS environmental standards. The part is designed for through-hole installation and can be used in a variety of applications.