Five advantages: Silver-plated copper contacts, flame-retardant shell, high-brightne light source, excellent electrical conductivity, wide application, Metal button head, shiny, not easy to age, sensitive to touch Precision helical thread, nut-type installation and fixation, easy installation, uniform and firm acceptance Metal tightening nut, smooth appearance, fast tightening Silver-plated contacts, silver contact design, good conductivity, soldered lead, stable and durable Product parameter name: metal button switch Operation type self-locking/self-resetting Installation diameter: 16MM Material: Nickel-plated bra/stainle steel Lighting form: round electric beacon / round Contact form: 1 open 1 closed/normally open/normally closed Wiring method: wiring Electrical life: more than 200,000 times Rated voltage: 3- 220V Rated current: 2A Button form: with light LED color: 5 colors are available, please leave a meage about the color you need. (If there is no special meage, the blue LED will be sent by default.) Button common sense Self-locking/self-resetting button Self-locking: After preing, the button will sink and lock, and it will pop up when you pre it again. Self-reset: After preing, the leave button will pop up immediately. Normally open/normally closed contacts Normally open: Normally in the disconnected state, it is connected after preing. Normally closed: Normally on, it will be disconnected after being preed. Package Include: 2pcs push button switch (without wires) Pls note: 1. Due to different computer display colors, the actual color may be slightly different from the above pictures. 2. Due to manual measurement, please allow 1-3cm error.