Trigger Point Grid Vibe Plus Foam Roller Sports Medicine : The new multi-density GRID Vibe Plus has been refreshed and made into a more premium product. This new foam roller features 4 vibration frequencies, including lower settings designed for muscle relaxation and high settings for more intense muscle stimulation and recovery. This roller is still ultra-portable and offers a cordless, rechargeable battery that last for up to two hours. Frequently Asked Questions