4 EAR CLIP/CLAMP ELECTRODES-(Clip to 2mm Female ) These allow a user to connect these to 2mm pin Lead Cables 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. Ear Clip Electrodes are great for microcurrent stimulation therapy. They are compatible with numerous EMS & TENS units on the market. Between treatments, it is recommended that the Ear Clip Electrode be kept clean and dry. These Electrode clips/leads-connect and act as an adapter to Electrode Lead Wires with 2mm female Connects 4 Plastic Clip Electrodes. Each measures .39" wide by 1.5" long. Thank you and have a wonderful day!