Specifications: With large digital display, free setting function, suitable for bedroom, office, etc. Clock function: display hour and minute, and 12/24-hour display mode. Date function: display month, day and year (2000-2099). Alarm function: select the alarm switch by turning the alarm switch to set the daily alarm. Temperature function: temperature measurement range -10 to 50 Celsius degree (14 to 122 Fahrenheit), Fahrenheit and Celsius display can be switched. Power saving function: press the MIN/DATE key to turn on the power saving function (on display on sd, off display of sd). Brightness adjustment: three brightness adjustments (light, week, off). Memory function: built-in battery 3.0V. Power supply mode: DC 5V power supply, or 3 x AAA batteries (battery not included). All keys have a key tone. Item Name: Alarm Clock Material: ABS Display: LED Display Built-in 3.0V Battery for Memory Function (Included) Clock Power Supply: DC 5V USB Connection, Or 3 x AAA Batteries (Not Included) Features: LED Display, Big Screen, Temperature Display, Setting Function Size: 170mm x 90mm x 50mm/6.69" x 3.54" x 1.97" (Approx.) Notes: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package Includes: 1 x Alarm Clock 1 x Manual in Chinese and English 1 x USB Cable