The WST188 with Timer is a 12V/24VDC control module manufactured by Velleman. It is a set-and-forget switch that controls low-voltage electrical devices like fans, motors, pumps and lights automatically. It is suitable for intermittent operations and can be used to set a repeating, fixed-duration cycle for powering-up and powering-down the attached device. It features a simple plug-in design, adjustable timer dial, easy-to-follow instructions, and a green LED to indicate timer operation. The timer can be set to activate for as little as 0.05s up to one minute. The WST188 can also be used to activate multiple devices for a specific time. The WST188 is a versatile, reliable, and easy-to-use control module for all types of low-voltage electrical projects.