Improvements in a car seat where the car seat is adjustable to accommodate infants to adults. There is also provided a deployable element in movable relation to the spinal cage. The master and the slave components are physically separate and communicate wirelessly. In the preferred embodiment, the echo canceler samples an analog output signal of the transmit circuitry and produces an output signal representative of the echo signals and the non-linearities. Various aspects of the present disclosure may, for example, provide an ultra-slim finger print sensor having a thickness of 500 \u03bcm or less that does not include a separate printed circuit board, and a method for manufacturing thereof.