The HET01 is an in-wall digital timer switch with 7-day programming. This timer switch allows users to program and save up to 18 unique pairs of ON/OFF settings. Program unique lighting schedules for all days of the week, individual days of the week, weekdays-only, or weekends-only. The digital timer includes a daylight savings time feature and a random mode that can be used for extra security when away on vacation. It features a large LCD screen with blue backlighting and a built-in battery pack that retains saved programs in the event of a power outage. A manual override button allows the load to be turned ON/OFF at any time. This device works with most lighting types.