The Velleman WST111 is an electronic timer for intermittent operation at 12VDC. It can be used to turn appliances, lights, etc. on and off at certain times. The timer is capable of setting an OFF delay of 0.5 minutes to 8 hours and an ON delay of 0.1 seconds to 300 minutes, each set independently. It features three operating modes - Interval, Delay On, Delay Off - which can be combined in various sequences. Additionally, it has a manually operated switch, an LED display, and is powered by a 9V DC battery.