Walker's Ultra Behind The Ear Enhancer Electronic Earplugs - Increases hearing. Compact behind-the-ear design can be used in either ear. Lightweight. On/Off switch.Included: Unit, sound tube, 3 tulip tips (one of each size small, medium and large), 3 batteries and 2 maintenance tools Increases hearing Compact behind-the-ear design can be used in either ear Lightweight On/Off switch Mild compression circuit Power source #LR-44 battery Included: Unit, sound tube, 3 tulip tips (one of each size small, medium and large),3 batteries and 2 maintenance tools