BN-LINK BND-60 U57 is a photocell countdown timer that provides control over attached devices and offers several operating modes to meet your needs. With its dusk-to-dawn and countdown modes, you can automate lighting or other devices to turn on at dusk and remain on for 2, 4, 6, or 8 hours, or until dawn. The timer also features an ON mode for continuous power and an OFF mode to disconnect power completely. Its weather-resistant design makes it suitable for outdoor use, and it can handle a maximum of two devices with a total power consumption of 1875W.