Easy to Operate -- Coming with a large LCD display and a convenient manual override switch that allows you to skip the programs if your schedule changes. Safe Material -- The digital time switch is made of plastic, non-toxic and odorless, which is safe for home use and can be used repeatedly and for long time use. Battery Backup -- With the built-in battery backup, the unit retains the programming even in a power outage and saves you the trouble of having to reprogram. Energy Saving -- The timer automatically turns on and off lamps, Christmas lights, humidifiers and other appliances to save energy and streamline your daily routines. Widely Application -- The timer is accurate with industrial grade chip is suitable for household appliance, advertising board, road lamp, neon light and so on.