Massage heads in different shapes to be used on different muscle groups,and provides targeted treatment for fast recovery; easy and quick to disassembly massage heads in seconds RoboTouch TorqueL Massage Gun is Ready to Activate or Ready to Go! Just Equip and Start Massaging your Muscles with it. This cordless electric massager gun is equipped with rechargeable high-quality 2600mAh Lithium-Ion battery, massage gun can keep working for approximately 4-5 hours(depending on the speed levels that you use after full charge).