These disposable snap electrodes provide the same signal transmission as reusable electrodes, with added convenience and hygiene. Each peel-and-stick foam-backed sheet has two electrode contacts and each electrode is pre-gelled. The fixed spacing between the electrodes are optimal and used primarily for recording nerve conduction measurements, cardiac output, electrical bio-impedance and general-purpose surface EMG measurements. Designed for one use only. Use with NS-7639 (see related products) unshielded electrode lead.