Bjorn is an ergonomic and lightweight personal massager with two powerful speeds Its cordless and lightweight design makes it easy to take a break and relax. Two speeds provide amazing relief for aching muscles, making it great for sore necks and feet. Whether at one or away, Bjorn will make it convenient to enjoy a soothing Swedish massage anytime. Measurements: 6 inches in length, 2 inches in width. Material: Plastic. Color: Blue. Note: Requires (2) AA batteries, not included