MULTIFUNCTIONAL MASSAGE GUN: Up to 3300 percussions per minute but no more than 50 dB. DARKIRON massage gun can help the user relieve muscle stiffness and soreness, increase blood pressure, improve the overall health of the body's soft tissues, moreover, it can prevent fascitis which is a kind of painful and difficult to heal inflammation caused by adhesion between the fascia and muscles.2020 NEW VERSION: DARKIRON Massager adopts high-quality motor, has ultra-strong heat dissipation function, no crash, it can run for a long time and would not stop working because the movement is overheated; At the same time, the high-precision mould makes the machine head and the body tightly connected, the noise in the process of running can be effectively reduced by smooth sliding. DARKIRON is quieter compared with 50 decibels from other suppliers. 6 REPLACEABLE MASSAGE HEADS & 30 ADJUSTABLE SPEED LEVEL & 1 PORTABLE CASE : DARKIRON massager is equipped with 6 different shaped massage heads to help the user to relax different body parts. The user can change the massage gun’s speed as needed. 400 to 3300 percussions per minute.LONG WORKING TIME: The DARKIRON cordless massager is equipped with 2000mAh high-quality lithium battery, so it can keep working about 6 hours after per charge. The body massager has an LED battery indicator so you don't have to worry about power outages.RATIONAL DESIGN: DARKIRON handheld massager only weighs 1 kilogram(2.2lbs), the ergonomic designed grip minimizes external vibrations and the durable anti-slip silicone grip makes the massager easier and comfortable to hold for your enjoyment.