The Conair Body Benefits Vibrating Neck Massager, model NM6S, is a massager designed for use by individuals with neck pain due to injury or disability. This neck massager features three relaxation therapies: variable speed vibration massage to customize massage intensity, heat, and a choice of 10 comforting sounds. The massager is made of memory foam filling with soft fabric covering, and it is secured around the neck with hook and loop fasteners. It is controlled by a hand control that is connected with a cord. POWER: Uses 4 AA batteries (not included) or an AC adaptor (included) with 9-inch cord.