Designer: Ted Pierson, 2009 Manufacturer: Spore, U.S.A. True bridges the gap between modern and traditional design. An all-metal push button is surrounded by a thin halo of LED-illuminated color, which also reflects against the mounting surface. Designed to fit well with residences built from 1900 on. Substantial in feel but narrow in diameter, True mounts well to narrow doorjambs and other tight applications. NOTE: These Spore doorbell buttons are for a WIRED-IN doorbell system, consisting of a doorbell button, a power transformer, and a doorbell chime. An electrical power source from inside the building connects the button to the chime using a power transformer to convert the electricity to a lower voltage. This transformer is NOT included with the doorbell button or chime. The power transformer required would be an 8-16V AC, or 6-12 DC. Dimensions: Ø 4.57 cm x Depth 1.9 cm