NO ADDITIONAL PINS or WIRES NEEDED -- these electrode clips are already connected to their own leads to fit digital/TENS massage machines that have a plug-in/jack connector that is 3.5 mm in diameter.
Cable Length: 1.2 m (37.2")
2 Plastic Clips. Each measures .39" (1 cm) wide by 1.5" (4 cm) long.
DC Jack Diameter: 3.5 mm
Packing include :
1*pcs Ear clip electrode line
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'