Includes 3 Packs of 4 Self-Adhesive Electrodes (12 pads)2" x 3.5"These Electrodes are for the InTENSity 10 TENS units. The carbon film adhesive electrodes used for TENS are made with high quality stimulation gel. The pads have soft backing, suitable for most areas of the body. It features durable reuse life, no residue and strong connection.