An improved bow sight adjustment mechanism for use with an archery bow is provided. A test packet transmitter of the entry device transmits the delay test packet to an exit device through a route corresponding to the priority information. The semiconductor wall is located away from the end facet of the laser structure. Additionally, the sheet may be used to apply sunscreen to the user’s back or entire body more than once before discarding the sheet and may include or consist of dyes, paints, tints or emboss to change the color or design of the sheet.