We designed 6 vibration strength, from weak to strong, effectively relieve your body muscle soreness.^This massage gun is equipped with 4 types of massage heads,Round head*1,Flat head*1,Ball head*1, U head*1which are suitable for different parts of massage to meet your massage needs^This mini massage gun is only 6.85 inches size likes smartphone . It can be put in a bag, especially suitable for people who travel lightly.^Built-in smart chip, it can recognize massage movements and increase vibration intensity during massage.^we use typc-c charging port,support charging by laptop,power bank and usb charger and so on;built-in the li-battery with 1800 mAh to support mssage you Max 6 hours.