• ADVANCED EMS TECHNOLOGY: Neck massager uses Electronic Muscle Stimulation (EMS) technology. Back massager transmits electrical impulses (electric current) to your body which relives pain and fatigue. Perfect combination of traditional & high tech massage nursing. Adopting intelligent technology, massage technology and simulation of manual massage. Body massager for pain relief• DURABLE MATERIAL & SKIN FRIENDLY: Massager pad is made of PU material, which is soft, durable, long lasting, odor-free and skin-friendly and massage machine pad can be used for a long time. Body massage machine ‘s host is also equipped with quality material.• 8 MODES & 19 STRENGTH LEVELS: Neck massager for cervical pain has 8 massage modes to choose from. It has 19 strength levels, users can simply adjust the levels using the + / - buttons on the device according to personal needs. Giving you the feeling of a real massage, and getting the effect of relieving fatigue. The recommended duration of use is 15 minutes each time.• EASY TO USE: 1. Stick the massager machine for pain relief where the body needs it. 2. Turn on the power and select a mode. 3. Adjust the output level and use it for maximum 15 minutes per person at a time. 4. To turn off, press the "OFF/DEC" button until the light goes out.