Dual Vibration Digital Timer and Clock Silent Kitchen Studying Cooking Gift (Mint) Size: 2.4 x 2.8 x (h) 0.5 [inch] Material : ABS, Rubber coated ,Component: 1 Clock, 3 batteries (LR1130) ,Alarms can be set ,memory can be set (Save and recall the time again in the past) Set Timer and Alarm Vibrate / Silent / Sound / Mode to be converted Advanced packaging good as a gift There is no English manual How it works is very simple.(Check product reviews or Please contact me )