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 ClockMaterial: ABSDisplay: LED DisplayBuilt-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 FunctionSize: 170mm x 90mm x 50mm/6.69" x 3.54" x 1.97" (Approx.) Notes:Due to the light and screen setting difference, the items color may be slightly different from the pictures.Please allow slight dimension difference due to different manual measurement. Package Includes:1 x Alarm Clock1 x Manual in Chinese and English1 x USB Cable