A photosensitive resin composition is disclosed that includes a heat-resistant polymer of the general formula :, a photoreactive compound, and a solvent. The described power management methods reduce the power consumption of battery-operated RFD) readers and REED tags. The PDA comprises electronics for wireless communications and a contact information database and a means for coupling the handset to the PDA. The collimator mirror also reflects the collimated image towards the front of the enclosure where it encounters the flat mirror oriented to deflect the image upward into the mirror box location of the enclosure at an appropriate angle. The individual channels of the connection comprising N channels furthermore appear in the exchange according to the use of their resources; however, only the first channel is responsible for controlling the connection, so that only one single N-fold connection is set up through the switching system. The system may include a rotatable drum for receiving items to be deodorized, a steam generator for supplying steam to the drum, and a passage for generating a forcible flow through the drum.