PromptThe battery can only be used normally for 1-3 days. We usually recommend using USB. Description:3 x AAA Batteries (Batteries are not included)Adaptor Input / Battery Type: 1pc USB power supply cableMaterial: Wooden frame with graining coatDimension: 60 x 60 x 60 mm (L x W x H)Quantity: 1 pcPackage Includes:1 X USB cable1 X LED wooden clock1 X User manualFeatures:Alarm function.Powered by USB power supply cable or 3 x AAA batteries.Buttons operation: UP, DOWN and SETIt has LED display of time and temperature alternately.Up: To change the time in settings mode. in normal mode to change temperature FormatTime display 12-hour or 24-hour modeThis designer LED digital alarm clock is made of imitation wood and its face is enclosed inside the wood.It also works in voice mode. Make some noise (clap your hands, rap on the table or pat the clock) nearby can wake it up.Down: Sound Activated switchNote :If the power supply is switched on,but it does not work, please press "reset" button