Infi Heating Belt aka heating Pad is an effective remedy for neck pain, back pain and other kinds of muscle pain with heat therapy because it boosts circulation, which then allows nutrients and oxygen to travel to joints and muscles. This circulation helps repair damaged muscles, relieves inflammation, and improves neck and back stiffness Read the complete instructions Plug the power cord Into an electrical outlet Adjust the switch to the desired heat level Position 1: 45 Volt-50°C Position 2: 50 V-60°C Position 3: 60° V-85°C Place the heating Pad on the area to be treated. Turn the Heating Pad off & unplug the Power continue after use