2-channel bipolar adapter for intramuscular detection – Screw Connector (Gain = 5): It gets power and reference at one end to which it supplies the preamplifier output. At the second end, it connects a couple of thin wire electrodes with insertion needle (Fi-Wi2) for intramuscular detection. This active one-channel adapter connects to the Quattrocento only via the AD8x2JD passive adapter.