An ink jet printer head including a cavity unit; an piezoelectric actuator; and a wiring substrate. The wireless transceiver of the first device is operable to transmit a signal identifying an audio file selected by the user and the wireless transceiver of the second device is operable to receive the signal, and, upon receipt of the signal, to play the selected audio file on the audio speaker of the second device. The present disclosure also describes kits that comprise the various components for preparing and applying the bioadhesives. Then, and after the image is stored in nonvolatile memory, the processor are reset, thereby activating the code update image, the processor subsequently coming up from the reset to an operational state. The cross sectional flow area of the first adsorption chamber may be smaller than the cross sectional flow area of the second adsorption chamber.