1. Instructions for Use: Only positive and negative currents circulate in the body. When connecting two electrode pads, note that two of the four wires are bonded together, and one of the bonded wires must be selected separately. If two bonded wires are selected, the device will not power on. The bonded wires correspond to two positive poles and two negative poles. 2. Precautions Before Use: The Runqin electrode pads must be attached to the body before turning on the device. After starting, you need to connect 4 pads, 8 pads, or 2 pads simultaneously. 3. Adjust as You Want: The TENS pain relief muscle stimulator offers 6 modes and 15 adjustable intensity levels. 4. Digital Stimulation Device: Utilizing digital Runqin technology, this device ensures precise physiotherapy and significantly improves therapeutic effects. Its unique immunemodulating function helps enhance and regulate the body's resistance.