Activate Deep Muscle Fibers, Speep Up Muscle Building and Fat Burning MStim Sport LGT-232 is wireless EMS Unit for Building Muscle More Efficiently. It also helps burn more fat, strengthen muscles, and improve athletic performance. Being small, lightweight, and wireless, it can be used anytime, when working, sitting, sleeping, or exercising. Use with “MStim Sport” App on your mobile phone for easy operation. Highlights Wireless electrical muscle stimulator Intuitive app - “MStim Sport” Bluetooth connection 7 training modes Muscle intelligent recognition for more precise stimulation 4 devices used simultaneously