(4) EAR CLIP/CLAMP ELECTRODES (Like the Picture Shows)with 2 clampElectrodes Connecting to 3.5mm Plug Lead Cable for Digital Massager, TENS Function and Product Description: Research has shown earclip electrotherapy has been used to control anxiety, depression, and/or insomnia without drugs. www.alpha-stim.com/the-alpha-stim-scs/An Ear Clip Electrode is the logical choice to turn to when performing electromyography diagnostics and stress testing, which are two situations where electrical stimulation is necessary on the ear. An Ear Clip Electrode by Roscoe is great for microcurrent stimulation therapy. It is compatible with numerous EMS & TENS units on the market. Between treatments, it is recommended that the Ear Clip Electrode be kept clean and dry. Electrode clips/leads-connects to Digital Massager Units that 3.5mm plug-in-jack connector Length of Lead is 37.2 Inches Long 2 Plastic Clip Electrodes on each lead line. Each measures .39" wide by 1.5" long. DC Jack Diameter: 3.5 mm Thank you and have a wonderful day!