The 1PC Self locking 16MM Latching Push Button Switch With Blue LED lighting 4Pin R16503 is a compact control switch designed for simple and reliable on off operation. Its self locking, latching action keeps the circuit in the last state until the button is pressed again, while the blue LED provides a clear status indication. Key benefits Self locking latching action prevents accidental toggling and gives a clear on off state with each press. Blue LED illumination provides a visible status indicator for quick confirmation of the switch state. 4pin wiring supports both the switch function and the LED, enabling straightforward electrical connections. 16 mm diameter size offers a compact, versatile option for integration into a variety of applications. 1 piece per ensures straightforward procurement and deployment. Key attributes Functionality: Self locking latching push button switch with blue LED lighting. Size: 16 mm diameter. Pins: 4pin configuration. Illumination: Blue LED lighting. Model: R16503. Quantity: 1 piece. Applications Use in control systems and equipment to toggle power or a process, with a visible ON indication from the blue LED. Suitable for DIY electronics, prototyping, or projects that require a compact latching switch with LED status. Ideal for enclosures or cabinets where a small, reliable latching push button with indicator is needed. Notes This description reflects the product as specified by the title: 1PC Self locking 16MM Latching Push Button Switch With Blue LED lighting 4Pin R16503. It highlights the selectable action, size, LED feature, and 4pin configuration to aid in selection and integration.