Electronic Muscle Stimulator(XFT-320) Automatic Shut-off Electronic Muscle Stimulator with Low Frequency Waves and Tuning Electronic Muscle Stimulator(XFT-320) 1.Relieves pain in shoulders, back, waist and other parts of body with electronic tuning.2.Soothe anesthetization and reduces fatigue with unique massage techniques.3.Restore the flexibility of skin with effective electronic low frequency ...