KREBLY F4 Massage Gun gives therapy-level results while being easy on the hands and quiet enough for pain-relief anywhere - even at work Krebly F4 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 fasciitis which is a kind of painful and difficult to heal inflammation caused by adhesion between the fascia and muscles. ✔ LCD Display Shows speed level and battery level directly, You can adjust a suitable speed according to your needs and you also can get your massage gun charged before it runs out of battery. ✔ Powerful and Quiet Brushless Motor The new generation ultra-low damping technology is equipped with an aerodynamic noise reduction shell, rear motor filter, and sound insulation plate. It is quieter compared to competitors. ✔ Multi-Ventilation Heat Dissipation Design Equipped with vents on both sides and on top, the massage gun has an expanded heat dissipation area, increasing its product life. You don’t need to worry about overheating even if you use it for a long time. ✔ 30 Speeds with MAX 3200RPM Choose your desired speed based on muscle group and your own preference(30 adjustable speed level, ranging from 1200 to 3200 percussion/mins).12 mm amplitude provides deep muscle relief and overall recovery, decreasing pain and increasing range of motion. ✔ Long Battery LifeThe Krebly massage gun is equipped with a Lithium Ion rechargeable battery,It can keep working 6 hours after per charge. Charging time is 2.5 hours.