R19A-62BBOT is a type of Switronic timer switch. It is a switch designed to control electrical devices such as light bulbs and appliances. It is an electronic device with a knob-like operator used for automatically turning an electric device off after a specified time period has elapsed. It may also be used for switching lights periodically during the course of an evening, or to automatically turn on a lawn sprinkler system at a set time. It is commonly used to conserve energy by controlling lighting and other electrical devices when they are not needed.