Read the User Manual before use the clock，advise open the voice control to save power otherwise the battery will soon depletion about one week，USB power is also a good choice.Description:Material: Wood & PlasticShape: CuboidDimension: 15cm x 4cm x 7cmPackage size: 17 x 4.5 x 9 cmUSB Cable length: 100cmAdaptor Input / Battery Type: USB power supply cable or 4pcs AAA Batteries (Batteries are not included)Adapter Output: DC 5VWe recommend to use USB cable to support the power. The clock worked with battery can only last about 2-3 days.Color: Bamboo Wood + Green LEDFeature:Display Mode: Time / Temperature display at the same timeWith Sound Control ModeCalender: 2000/1/1 - 2099/12/3112/24 hour format selectableDisplay temperature of ℃/°FAlarm function， three alarms ，with "beep" lasting for 1 minuteWork day set: alarm by Monday to Friday， Saturday to Sunday is closedLED display， easy to view even at nightPackage included:1 x Digital wooden alarm clock with LED display1 x USB power supply cable1 x English user manual