1.Package with one USB cable ， batteries only backup if use batteries only can work about 2-7 days. 2.China customs can't pass battery so we take out the momery battery CR2032 . 3.Material: MDF+PVC，not real wood .4. Temperature also have 3 degrees difference . Open sound control temperature not correct . 5. When clock not display please only use USB Cable and reset clock . Features: Display time and temperature/Year，Month，Date，can work by sound control . Time display 12H or 24H .Three luminance to set(L1-L2-L3).��C/��F display of temperature.3 Group alarmPower Supply : USB/Batteries(4*AAA，not include). Size:150*70*40mm (LxWxH) More information please contact us : qansi_service5@163.com