- Size: 10 * 15 * 6CM; -4 inch diameter clock face 

[Material]: the body is metal， ABS plastic cover 

[Description]: You can set the alarm to ring a bell or music ringtones， true dual-bell alarm clock! Knob is loose: alarm clock design will become loose knob design bayonet coupling way， it is loose， but it will not fall out， but will not affect the use of the alarm. 

[Installation]: need to bring two AA batteries.