The TENS Pulse Massager is an electric muscle stimulator designed for neck and back relaxation and massage. The package includes one device with 8 pads (battery and adapter not included), 10 electrode pads (20 massage stickers total, separate purchase not recommended), a USB cable, a manual, 2 connecting cables, and 8 electrode pads that can be used about 50 times each. To install the batteries, open the battery cover, insert AAA batteries with correct polarity, and close the cover securely. Prepare the electrodes by peeling off the protective film and store them on the plastic sheet after use. Clean the skin area to be massaged to remove oil and dirt, then place the electrodes directly on the skin; both electrodes must contact the skin but do not need to be symmetrical. Turn on the device by pressing the power button; the LCD screen will display the mode, intensity, and time (default is 15 minutes). You can switch the display language between English and Chinese. Use the function button to select different therapy modes such as massage, acupuncture, manipulation, scraping, cupping, weight loss, and immune adjustment. Intensity can be adjusted through 15 levels with the plus and minus buttons. The treatment time can be set from 5 to 15 minutes, increasing in 5-minute increments each time the time button is pressed.