The Sensory Plate and Switch, model 885, is a sensory integration activity, touch switch, and adapted music box designed for individuals who require exceptional sensory input. The base has bead chains across an unbreakable plastic mirror which vibrates and plays music when touched. The unit can also be used as an external switch without vibration and music when connected to a toy or device. It comes with the standard 0.25 inch plug an d jack or with 1/8 inch plug and jack. DIMENSIONS: 5 x 8 inches.