Note: INSMART has upgraded the product packaging to improve the buyer's experience! Upgrade to 3-in-1 respectively! TENS:Pain erlief (P1-12) EMS:Muscle coditioning (P13-P24) MASS:Relaxing body (P25-P36) INSMART TENS machine is safe, non-invasive, drug free method of pain relief and pain management.It utilizes reliable TENS therapy method and imitates manual massage to help boost blood circulation and relief back pain, general pain, neck pain, muscle pain. Easy home use designed, allowing you to use it at home, office and during travel conveniently. Specification: Color:White Material:Metal Size:5.3x9.5x5 cm/2.1x3.7x2 inches Power Supply:USB Battery capacity: 200mAh Operating time: 60mins
