The present invention relates to a wireless communication system, and more particularly, to a method and device for communication between terminals in a wireless communication system. The VQ system operates a receiver forwarding quantized channel state information in the form of indices and a transmitter predicting channel state change. A locking mechanism prevents the child restraining member from inadvertent pivoting horizontally during use. A pharmaceutical, dermatological andor cosmetic composition is disclosed comprising as active constituent the boroxine compound.