A packaged optical device includes a substrate having a surface region with light emitting diode devices fabricated on a semipolar or nonpolar GaN substrate. At least one transmitter for transmitting a data signal indicative of the output signal is associated with the seat and coupled to the seat sensor; and at least one receiver is coupled to the control unit for wirelessly receiving the data signal from the transmitter. The printing device also includes an element movable with said print head subassembly for ensuring that the wrap of the imaging member around the platen is substantially symmetrical about the print line such that the thermal heating elements of the thermal print head are substantially parallel to the surface of the imaging member when printing on each side of the imaging member. High-purity octafluoropropane is obtained which can be used in a process for producing a semiconductor device. The second follower is operable to project the flange through the slot to contact and assist with ejecting the last spent cartridge case in the magazine. The method herein includes the steps of predicting decoding time until the next interrupt from the current interrupt is generated depending on both a type and size of frames and the system speed.