Valcom Rocker Switch The V-2972 Call Switch was designed to be used with Talkback Page Control Units with the remote calling feature. The V-2972 provides a momentary spring return rocker switch for connection to customer provided signaling equipment.DIMENSIONS/WEIGHT 4.50inH x 2.75in W x 1.50in D (11.43cm H x 6.99cm W x 3.81cm D)-0.2 lbs. (.09 kg)-FEATURES-Designed to fit in a standard single-gang electrical box.- No external power source required.- White Call button for normal call.- Satin finished one-gang stainless steel plate.