This device allows you to mobilize the sacroiliac joint and improve overall body balance. You can fine-tune the speed to receive stimulation at your preferred pace, which stimulates the sacroiliac joint. After use, there's a pleasant lingering vibration. I've confirmed that it powers on. I used it frequently for a while and then stored it carefully in a warehouse, so I believe it's in good working order. Includes the main unit and a sound-dampening base. The sound-dampening base has some storage dirt, so please consider it as a bonus. Please understand that this is a used item before purchasing, including the main unit. #Senkotsu-kun (Sacrum-kun) #Senkotsu-kun #SacrumAdjustment #Sacrum #HealthDevice #SacrumMachine #MRT #SacroiliacJoint