The invention discloses a kind of sulfonation cyclization technique for synthesizing acesulfame potassium for continuous production without stirring and special equipment for this technique. The plurality has a measurable characteristic and includes an adjustable solid state light source, such that the characteristic changes in response to adjustment thereof. The layers can be used to define keys overlying pressure sensitive regions of a wireless communications signal processing assembly. Non-overlapping time images are created from the full-scan images. In another embodiment of the invention, a mobile communication device is used to confirm a transaction. The value of the smallest angle between the central axes of the pump light sources is less than 180\xb0.