High Quality NEW!!! Material: Plastic Dimensions: 158 x 77 x 13mm Weight: 0.35 lbs Number of batteries: 1 CR2 batteries required. (INCLUDED) Battery cell composition: Lithium Manganese Dioxide Mounting type: Wall Mount Screen size: 6.5” large display Function: Time Display / Alarm / Snooze Time Display: 12 or 24 hrs format selectable Snooze: 5 - 60 mins (Default interval time is 5 mins) Brightness: 3 Steps Dimmer Control (High, Medium, Low) Professional sensor detects the ambient light. When the ambient light is dark, the LED digital brightness will be lowered automatically, to avoid affecting sleep during the night. Can be placed on the desktop or hung on the wall. Bright big numbers displayed, easy to read at a far distance. Dual USB ports - Can charge two electronic equipments at the same time, such as mobile phones, tablet PC, etc. Mirror design & Battery backup - Helps to memorize all setting, no need to set the time again when it powers off.