Annbrist Massage Gun Muscle MassagerA percussion massager is a handheld device that applies pulses of concentrated pressure deep into your muscle tissue. This form of deep-tissue massage can work knots and tension out of the muscles while improving blood flow and quickly enhancing range of motion. Brushless High-torque MotorWith Unique Quiet Glide technology and 12V Brushless high-torque motor.45dBFrom 1500 to 3300 RPM, the max noise only reach 55dB. It's very quiet when using.Long Battery LifeThe massage gun is equipped with a Lithium Ion rechargeable battery. Power a week's worth of workouts with up to 2 hours of massage per charge.What's in box1 * Massage Gun4 * Massage Attachments1 * Charger（Carrying case is not included）