These tuning forks can be placed physically on the body but also into the aura. They resonate at 136 .1.hz. This can be placed by the ears and on joints, muscles etc. and resonate at 136.1hz. This tuning fork is a weighted tuning fork which are placed by the ears and on joints, muscle etc which can help to provide relief from conditions such as arthritis, knee or back pain, surgery or a strenuous workouts as the vibrations resonate throughout the body.