S13199 Ergonomic Neck Shoulder Massager This multi-functional massage pillow adopts brushed motor for stable kneading massage. Equipped with a 2000mAh built-in rechargeable battery, 7.4V voltage and 24W rated power. It supports forward and reverse rotation kneading, 3 optional massage intensities, together with red-light therapy heating function to soothe tired muscles. Ergonomic curved shape fits closely to your body. It can be used on neck, shoulder, upper back, waist, thigh and calf. Lightweight and portable, ideal for relaxing at home, in office or during travel.