A range of motion prosthetic foot and passive dampening ankle joint have limited dorsiflexion-plantarflexion pivoting to accommodate different environments, and a spring to provide resilient resistance to plantarflexion, and to bias the foot in dorsiflexion. The system includes a processor and plurality of interactive zone switches for connection to at least one irrigation device; each zone switch further operable to detect a state of a connected irrigation device. The parity for all of the diagonal parity sets except one is stored on the diagonal parity disk. When the actuating button is manually pushed and slid along the slot, a portion of the sliding rack structure slides against the plastic sleeve portion in deploying and retracting the USB connector out of the device.