Heath/Zenith 601-PB Wired Push Button with Recessed Mount with incandescent Lighted Center, Polished Brass Low voltage hardwired push button Polished brass finish Incandescent halo-lighted Recessed Mount (.625-Inch hole required for installation) Works with low voltage wired doorbell systems Low voltage hardwired push button Polished brass finish LED halo-lighted Recessed Mount (.625-Inch hole required for installation) Works with low voltage wired doorbell systems