Dual speed massage wand by B well. Release muscle tension and provide deep tissue massage in those hard to reach areas. One button power control with ergonomic grip design. Relieve your muscle tension and reduce muscle injury with this intelligent and portable massage Wand. So simple to use. Just press one time for low vibration strength, press 2 for high vibration setting. Press a third time to power off. Specifications 14 inches by 4.75 in. Requires four AA batteries not included. Helps you reach all those spots your fingers can't reach.