SantaMedical Dual Channel TENS Unit/EMS Unit is a dual channel electronic Pulse Massager that contains two separate Dual channels, allowing you to treat two different areas of the body at the same time. This helps reduce treatment time and also allows for many effective pain management across various area of the bodies. Santamedical also provides other medical Products like Hot and Ice Packs, Tens Unit Replacement Pads, and many more. If you have any questions, Please visit our website - https://amzn.to/3vZHFtw