This is an aftermarket of generic part;One Size Fits Most: Adjustable Extension provided for up to 70 Waist;Discreet and Portable: Can be Discreetly Worn Under Clothes;Save Money: No Need to Replace Disposable Electrode Pads;Conductive Gel Not Required: Slightly Moisten Electrodes;Comfortable and Easy to Use: Provides Precise Electrode Pad Placement

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