This study is testing a device called NexWave to help people with non-specific chronic lower back pain (CLBP). The NexWave device has two modes: transcutaneous electrical nerve stimulation (TENS) and interferential current (IFC). These modes send small electrical currents through the skin to relieve pain. In this study, the NexWave device will be compared to a non-working (sham) device and the usual care that people use for pain relief. Non-specific CLBP means back pain that lasts for at least 3 months without a clear cause. To join, you must be 18-70 years old and your pain score must be 50 or more out of 100. You cannot have used a similar device before or have certain health conditions, like spine surgery or psychiatric issues.

• The study is randomized and single-blinded, meaning participants don't know which device they are using.
• Participants must be willing to attend all required visits and complete questionnaires.
• Excludes those with certain health conditions or those already using similar devices.