Homedics: Neck & Shoulder Massager W Heat Ergo Joint support Introducing BLackstone Labs Resurgence+Nootropics KJlabs Introducing BLackstone Labs Resurgence+Nootropics we want to stress that nothing substitutes for a healthy lifestyle but there are so many things in this world that people and sometimes especially athletes come in contact with that can be harmful to the liver that we felt the need to offer this unique HoMedics NMSQ 210 Neck & Shoulder Massager W Heat Ergo FeaturesInvigorating vibration massage for the neck and shouldersSoothing heat enhances your experience2 speeds: choose low or highErgo comfort design flexes for a perfect fitBattery and adaptor driven (4 AA batteries not included)