Percussive Massage Therapy Device Theragun Pro G4 is a smart percussive therapy device designed to enhance muscle recovery, release stress and tension, and soothe discomfort. At 16mm amplitude, the massage gun travels 60% deeper into the muscle precisely 40 times per second than average vibration massagers. Fully personalized for your body’s needs, Pro G4 comes with 6 non-porous, closed-cell foam head attachments (supersoft, dampener, standard ball, wedge, thumb, and cone) to target different muscle groups. Features QuietForce Technology Theragun Pro G4 uses a commercial-grade brushless motor with QuietForce Technology, delivering up to 60 lbs. of force without stalling. At a remarkably reduced noise level, the percussive therapy device produces a rapid, pounding force in short duration pulses which penetrate deep into the tissues of your body. The massage gun also has the ability to switch between customizable speed ranges, between 1750 and 2400 percussions per minute. Charge your PRO in one easy step, simply sliding the device into this convenient wireless charging stand without the hassle of wires or pins. Charging in 125 minutes, Theragun PRO can remain in the charging stand even when fully charged. Smart App Integration with Bluetooth Therabody's new app allows you to use Bluetooth to control speed and amplitude through your smartphone. Receiving real-time feedback on the pressure applied during use, the smart device allows you to visualize your massage in the app. It's Siri-enabled and 'talks' to your body through an app that houses different treatments, from morning wake-up routines to post-run recovery and even 'downregulating' your nervous system before sleeping. Theragun Pro G4 is built to last, with 5 hours of total battery life and 2 continuously swappable external batteries.