An apparatus for monitoring one or more than one biological parameter is provided. The apparatus comprises two or more than two layers, each layer comprising a flexible substrate, the two or more than two layers comprising two or more than two sensors for sensing the one or more than one biological parameter； a signal conditioning module in communication with one or more than one of the two or more than two sensors； a signal processor in communication with the signal conditioning module and producing a processed signal； a communication module in communication with the signal processor and transmitting the processed signal to a storage module, a display device, a host processing system, or a combination thereof； and a power module to provide power to the two or more than two sensors, the signal conditioning module, the signal processor, and the communication module.
