Overviewr-c4d ems-tens-massage device physical therapy and massage device ?ems-tens-massage device? 9 programs tens ? 8 programs ems? 5 programs massage? 2 channels? Sensitivity adjustment between 0-40? large LCD screen? 2-year warranty package content: 1 tens device r-c4d 4 electrode adhesives 2 double electrode cables 3 AAA batteries Warranty certificate and user manual Usage information: Tens mode: neck, shoulders due to strain caused by exercise or normal household chores It is used to temporarily relieve pain associated with muscles in the back, joints, hips, hands, abdomen, arms and legs. ems mode: 1.relaxing muscle spasms 2.preventing or delaying disuse atrophy 3.increasing local blood circulation 4.retraining muscles 5.maintaining or increasing range of motion massage mode: massage simulation program provides relaxing muscle vibration to loosen tight muscles. '''''' the device can be used at home or at home, the device user() must be over 18 years of age. '''''For electronic products, the right to return the product directly after the product box is opened is void due to hygiene rules.