Spectacles. There is a linkage connecting the spectacle sides to the main frame. It is useful as it can allow the user to wear on the spectacles and not drop down, and also, it also provides an easier way to keep the spectacles as it can be 'retracted'
Sliding Handphone. It is a lever, and it provides the user an option to slid the phone all the way up to type or key in messages, call someone or simply just play games. Also, it reduces space as the user can slide the phone down when he or she is not using.