Shoulder massager 1. Three-speed massage with high-frequency vibration, deep massage to relax muscles, relieving shoulder and neck pain. 6 adjustable temperature levels: 45℃,113℉/50℃,122℉/55℃,131℉/60℃,140℉/65℃,149℉/70℃,158℉, rapid heating to relax muscles and improve blood circulation.