Newcomdigi Digital LED Plug-In Timer Swtich Programmable Plug-in Digital Timer Switch with 8 Function Keys Support Daily Weekly Program This digital timer switch have 24-hour/7-day programming setting,will help you saving energy cost. The timer switch is easy to install and suit for lamps,fans,christmas tree lights and other electrical device. Rechargeable battery backup assures you stay on schedule even after a power outage. Can easily switch between Standard time and Summer time(DST); Interchangeable 12-hour/24-hour format Saves energy by automatically turning lamps, fans, christmas tree lights and other electrical devices on and off