The present invention relates to a scanning apparatus with different resolutions. The first communication causes the recipient devices to provide a message notifying the recipients of a task that should be performed. The housing is configured such that the first lock system is accessible from the front of the housing to release the electrical terminal from the first lock system. Animal experiment and clinical trial show that the invention has strong effect in reducing oxidative stress and disease prevention. The nitrogen gas compression spring is coupled to the slidable coupling to produce a slight torque preload to maintain the contact orientation of the slidable coupling and the lever arm the same throughout the excursion of the lever arm for all force loadings.