Special functions It has a unique design which is light and convenient transferring the weight to the hammer so that you only need to hold the handle of it gently and the hammer itself will act with its own weight & optimal result can be achieved without your further pressure. It is designed with physical ergonomics having an overall exterior design of unique streamline which enables you to have massage on any physical parts of your body at your ease. It is specially designed to have twin hammers with infrared function which continuously creating infrared thermal wave, having it go into your muscle tissues for the promotion of blood circulation while the hammer head touches your body. It has a novel and unique computer program controlled system which provides 5 different types of strength for beating with easy operation and convenient use. It is good for tiredness relief and strained muscle relaxing. It is great for relaxing tendon & activating collaterals and releasing muscle aching pain.