The Tork Indoor 24 Hour DPST Time Switch 1109A #90a is a wall-mounted mechanical time switch suitable for interior use. It features a maximum amperage of 40A and is designed for controlling electrical devices with a current rating of 31-40A. The switch has a timer orientation and is suitable for use with LED bulbs. With its auto-off feature and durable metal construction, this time switch is a reliable and efficient choice for managing electrical circuits in your home.