Versatile Application and Quality Assurance : This lightweight full-body electronic muscle stimulation device is suitable for shoulders, neck, arms, waist, back, and legs.Avoid using on vital areas such as carotid sinus nerves,chest,or the head.Each package includes one massage device, two electrode pads, one USB cable, and a user manualAdhesive Electrode Pads for Optimal Comfort : The mini back massager includes 2 pre-gelled replacement pads that firmly adhere to the cleaned skin.Soft patches can better adhere to the skin. Maintain their stickiness by washing the pads separately,but we suggested to use 20 to 40 times.If need more pads,search B0D422DJ4VRechargeable Design for On-the-Go Relief : Our TENS Unit Massager is equipped with a long-lasting rechargeable battery that only requires 30 minutes for full charge. You can charge it using any USB interface, such as a power bank,computer,or plug. It makes for a thoughtful gift for your parents,partner,or friends, ensuring relaxation anytime and anywherNon-invasive Drug-free Pain Management : This TENS unit massager uses low-frequency pulse massager technology for deep muscle relaxation, offering fast, safe, drug-free pain relief. It effectively alleviates pain and fatigue in your back, arms, neck, legs, or shoulders while promoting blood circulationPowerful TENS with User-Friendly Operation : This electronic pain relief stimulator unit provides 6 modes and 10 intensity levels to cater to various pain levels.15 auto shut-off function ensures safety,even during sleep. 15-30 minutes per day for best results. Due to variations in body sensitivity,for first-time users, we recommend to start with the lowest intensity level and placing the TENS unit massager on your back before activation