Review on Vibrating Massage Ball for Deep Tissue Therapy - Rechargeable and Electric Muscle Massager - 4-Speed Tool for Foot, Back, and Arm - Promotes Trigger Point Release, Myofascial Relief, and Pain Reduction by Brooke Washington

The product works as advertised, but the button is not pushed deep enough into the device so that it does not turn off permanently. I made a modification and covered the button with a pick to prevent this from happening. The vibration is strong, the heat works well and the ball works great after I modified it. The only other issue is that the battery has a short lifespan before it recharges. Need a bigger battery!