It uses electrical pulse therapy, such as TENS (Transcutaneous Electrical Nerve Stimulation), to stimulate muscles.
Many models include a hot compress function to help relax muscles and promote blood circulation.
The device is often wireless and rechargeable, making it portable for use at home, in the office, or while traveling.
It typically has multiple massage modes and intensity levels that can be adjusted to the user's preference.
Some models come with a remote control for easy operation.