16pcs Massage Stones Warming Therapy Reduce Pain Waterless Heating Smooth Heated Stone with Aluminum Box 220V EU Plug Item Type: Massage Stones Material: Basalt, wood Characteristics: no wax, no oil, original Energy Stone Size: Approx. 4pcs: 8 x 8cm / 3.1 x 3.1in 4pcs: 8 x 6cm / 3.1 x 2.4in 8pcs: 3 x 4cm / 1.2 x 1.6in Applicable People: 1. People who face computer, TV and drive for a long time. 2. People who Easy to shoulder and neck, back pain, mental tension, stressful. 3. People who long term insomnia, neurasthenia, headaches, dizziness, hair lost and memory loss. 4. People with insufficient blood supply to the brain, lack of oxygen and shoulder and neck discomfort. 5. People with chronic constipation, diarrhea, and gastrointestinal discomfort. 6. People with poor blood flow, irregular periods and menstrual pain.