DBTech JID0312GRN Big Oversized Digital Red LED Calendar Clock with Day Date and Temperature (Green) Easy to read in bright sunlight as in darkness, comes with 3 levels of brightness. Very convenient for the visually challenged, shows clearly the time and date no need to convert numbers to day and month. Show AM / PM status with a light underneath the letters, no need to guess what the dot stands for. Shows the current indoor temperature. No need to be reset if it loses power. Powered by AC adapter (included).