You use this to do  Maths. --> 

You use this to  time activities. --> 

You use this in a car  to  find  places. --> 

You use this like a computer. --> 

You put these on your  head to listen to music. --> 

You use this to  recharge electronic  gadgets. --> 

You use this to save  photos, documents and  music. --> 

You use this to see people  on your computer screen. --> 

 You use this to play  electronic games. --> 

You use this to listen to  music. -->