The Digital Timer with Daylight Savings changeover is used for automatically turning lights on and off at a set time. It features easy programming and offers a daylight savings adjustment option. Compatible with Kichler's Professional Series, Plus Series and Contractor Series transformers (excluding 15CS75SS). Features a replaceable battery backup to maintain the schedule in case of a power outage. Constructed of a white plastic housing. The Digital Timer with Daylight Savings changeover measures 2 inches wide by 2.75 inches long by 4.5 inches high.