The RP3508 Series illuminated pushbutton switch is a round, panel mount switch meant for a panel mount cutolut sized 16mm in diameter. Full illumination options include green, red, or yellow LEDs. The RP3508 Series illuminated pushbutton switches are meant for a panel mount cutout sized 16mm in diameter. They have solder lug terminals and operate in temperatures ranging from -30 to 85 degrees C. The applications for this round, illuminated pushbutton switch include: Telecommunications Networking Computers and servers Performance audio instrumentation Low power on/off designs External hard drives/modems