The iSTIM EV-804 TENS/EMS Combo Machine is a versatile and advanced device designed for pain relief and muscle rehabilitation. Utilizing Transcutaneous Electrical Nerve Stimulation (TENS) and Electrical Muscle Stimulation (EMS) therapies, this unit is favored by physical therapists and medical professionals. In this comprehensive review, we’ll explore the iSTIM EV-804’s features, performance and overall utility for individuals seeking effective pain management and muscle conditioning solutions.

Istim Ev 804 Tens Ems 2 Channel Rechargeable Combo Machine Review

1. Design and Features

Dual TENS and EMS Technology

The EV-804 combines TENS and EMS functionalities in one device (offering a dual approach to pain management and muscle recovery). Moreover, TENS effectively blocks pain signals and boosts endorphin production, while EMS stimulates muscles for recovery and strengthening.

Multiple Modes and Programs

Equipped with 5 TENS modes, 2 EMS modes and 24 preset programs, the iSTIM EV-804 provides a range of options to cater to various pain relief and muscle conditioning needs.

Japanese Electrode Pads

The device includes high-grade SEKISUI Japanese gel electrode pads, known for their efficiency in conducting electrical impulses and suitability for sensitive skin.

Rechargeable and Portable

With a rechargeable lithium-polymer battery and compact design, the iSTIM EV-804 is portable and convenient for use at home, in the office or on the go.

2. Performance and Usability

Effective Pain Relief and Muscle Stimulation

The EV-804 excels in delivering targeted pain relief and muscle stimulation (making it highly effective for conditions such as shoulder tension, back pain, arthritis and knee pain).

Customizable Therapy Experience

The wide range of modes and programs allows users to tailor their treatment according to specific needs (enhancing the device’s effectiveness and user satisfaction).

User-Friendly Interface

Despite its advanced functionalities, the iSTIM EV-804 is user-friendly (featuring an intuitive interface that makes it accessible to users of all experience levels).

3. Pros and Cons


  • Combines TENS and EMS therapies for a comprehensive treatment approach.
  • Offers multiple modes and programs for customized therapy.
  • High-quality Japanese electrode pads enhance comfort and effectiveness.
  • Rechargeable and portable (making it convenient for regular use).
  • Approved for over-the-counter use (ensuring safety and reliability).


  • The variety of options might be overwhelming for first-time users.
  • Replacement pads and ongoing maintenance could add to the overall cost.
  • Not suitable for individuals with certain medical conditions like cardiac pacemakers.

4. Safety and Precautions

Important Safety Information

The iSTIM EV-804 should not be used by individuals with cardiac pacemakers, existing cardiac conditions, or implanted metal devices. Consultation with a healthcare provider is advised before use, especially for those with specific medical concerns.

Usage Recommendations

Start with lower settings and gradually adjust to find the most comfortable and effective level. Moreover, ensure correct placement of electrode pads for optimal results. If discomfort or adverse reactions occur, discontinue use and consult a healthcare provider.



To conclude, the iSTIM EV-804 TENS/EMS Combo Machine is a sophisticated and effective solution for pain management and muscle recovery. In fact, its combination of TENS and EMS therapies, along with customizable settings and high-quality components, makes it a valuable tool for both home and professional use. While it requires careful consideration for certain health conditions and a bit of a learning curve, its benefits in providing targeted pain relief and muscle conditioning are significant.

Final Thoughts

For those seeking a versatile, effective and user-friendly device for pain relief and muscle recovery, the iSTIM EV-804 presents an excellent choice. It offers the flexibility and convenience needed for regular use, making it a beneficial addition to any personal healthcare regimen or professional therapy toolkit!