Features: 4 tuning forks with the most vital frequencies(128Hz,136.1Hz,528Hz and 4096Hz) equipped with 2 hammers and repair tool. Otto Tuner (Weighted) for hearing test, neurology exam, pain relief and relaxation. Use on any bone, joint muscle, nerve, any body part, etc. Ohm Tuner(Weighted )for meditation & relaxation. Place by the ears or on joints, muscles and nerve groups to relax the body, release stress and prevent illness. Use it on knees and feet for grounding. MI 528 is the best solfeggio frequencies biofield tuning which has a very relaxing effect on mind and body. 4096C Otto Tuner/crystal tuner/angel tuners/biofield tuning is quite high pitched, which help to open your mind to new ideas and provides increased receptivity. Package Includes: 1 Set Tuning Fork Specifications: Material: aluminum alloy Color: silver/gold/red note: Please allow 1-3cm error due to manual measurement. pls make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item.