The present invention relates to a light emitting device comprising a transparent substrate which light can pass through and at least one LED chip emitting light omni-directionally. A sleeve accepts an ACDC adapter, and guides movement of the ACDC adapter when the ACDC adapter is inserted into the cradle casing. The first and second cam levers each engage one of the second connectors and pull the engaged second connector into connection with a mating one of the first connectors. The strengthening layer is made of polymethyl methacrylate. These oligomers are useful for diagnostic, therapeutic and investigative purposes. An output bitstream is generated that includes the combined respective floating-point frequency samples.