ARK's Z-Vibe® is an innovative vibratory tool for oral motor therapy and beyond. Use it to normalize sensitivities and to improve a variety of speech and feeding skills. The Z-Vibe® is highly recommended for individuals with low oral tone, oral defensiveness, and/or texture aversions who need sensory oral motor stimulation. Made in the USA out of medical grade materials. Z-Vibe includes a special Z-Vibe battery. Spare parts kit includes: 1 motor assembly, 1 Z-Vibe battery, 2 compression springs, and 1 switch tip.