The specialized Diamond Electrode is an Active to Passive electrode adapter cable. It connects to the 8 EX inputs of the ActiveTwo (Biosemi) AD-box. On the one side the cable has a keyhole adapter and on the other side a standard 1.5mm DIN touchproof connector. The Inline Cable consists of an inbuilt active electrode circuitry that will change the high impedance from a standard passive electrode to a low impedance output. Standard passive electrodes (surface or needle) connect to the adapter cable. Keep the cable between inline adapter and passive electrode as short as possible to reduce noise (a few cm is optimal).