Checkmate Bishop Mains Led Calendar Temp Wall Or Desk Clock 36cm Details and Features: Mains powered. Power adapter included Red LED display is visible day and night. No need for light in the room Materials: Stainless steel Plastic Digital (silent) Date and weekday display Indoor temperature in Celsius or Fahrenheit 12 and 24hr time format Dimensions: 35.5cm Wide x 15cm High x 3cm Deep Weight: 750g Batteries required: 1 x button battery CR-2023 (included). For time memory only in case of power cut