The flexible head is designed to reach all your sore back muscles. Provides deep soothing vibrations. Helps to relieve muscle tensions. It is durable and very easy to use. It can achieve muscle relaxation in a very short period of time.
Fits Attachments with Diameters 1 7/8" - 2 3/8" with Cap, 1.5" - 1.75" w/out Cap It needs to be plugged in in order to use, it doesn't have a built-in battery.