iStim EV-805 Rechargeable 4-Channel TENS/EMS Unit—24 Programs, 24 Pads

The iStim EV-805 is a rechargeable handheld unit that combines four-channel TENS and EMS stimulation, making it suitable for users who need more electrode-placement capacity than a standard two-channel stimulator. Four independently adjustable channel intensities can support up to eight connected electrodes, and 24 preset programs offer a faster way to start when you don't want to program manually. 

What separates the EV-805 from many portable TENS/EMS units is not simply output strength—it is the four-channel layout. Each channel controls its own electrode pair and intensity, so the user can place electrodes on both sides of the body, cover larger treatment areas, or use multiple electrode pairs without having to move the pads around.

EV-805 at a Glance

Why Choose the Four-Channel EV-805?

A two-channel stimulator can operate two electrode pairs. The EV-805 doubles that capacity to four pairs while still allowing the intensity of each channel to be adjusted independently. That makes the four-channel configuration the main purchasing reason to move up from a smaller combination unit.

The EV-805 is especially worth comparing if you want the following features:

• TENS and EMS in the same rechargeable device

• Four electrode pairs available in one setup

• Independent intensity adjustment across all four channels

• Built-in presets plus manually adjustable parameters

• Two treatment timers for the CH1–2 and CH3–4 channel groups

• A larger starter supply of electrodes

What Comes With the iStim EV-805?

EV-805 vs. Other TENS/EMS Units

The EV-804 is the more compact choice when two channels are sufficient. The EV-906 is another rechargeable four-channel option and adds documented treatment-use compliance records. The prescription Twin Stim Plus DS5402 expands beyond TENS/EMS by adding interferential and Russian stimulation.

EV-805 or EV-804?

Choose the EV-804 rechargeable TENS/EMS unit when two independently controlled channels and up to four connected electrodes meet the need. Choose the EV-805 when four channels and as many as eight connected electrodes justify the larger four-channel format.

EV-805 or EV-906?

Both are rechargeable four-channel TENS/EMS devices sold with 24-pad kits. The EV-805 is positioned around its 24-program package and three included electrode styles; the EV-906 adds a documented compliance meter that stores treatment-use records. 

Need More Than TENS and EMS?

If the treatment plan also requires interferential current or Russian stimulation, compare the Richmar Twin Stim Plus DS5402. It provides four channels and four stimulation modalities, but unlike the EV-805, it is a prescription device that uses AA batteries or AC power rather than a built-in rechargeable battery. 

Learn More Without Duplicating the Product Manual

The EV-805 page should stay focused on choosing the product. For modality selection, programming concepts, placement education, and electrode information, use Balego’s dedicated resources.

Start with TENS vs. NMES: Differences, Uses & Device Guide when deciding between sensory TENS and contraction-based muscle stimulation. 

For Burst, Normal, Modulation, SD1, and SD2 programming, see TENS Modes Explained rather than repeating the five mode descriptions here. 

For condition- and body-area-specific resources, browse TENS settings and electrode placement guides or NMES protocols, settings, and electrode placement guides. 

For pad sizing, connectors and replacement-electrode education, visit our TENS electrode guides or compare Balego TENS/NMES/FES electrodes for compatible setups. Always confirm connector type and device instructions before ordering replacement electrodes. 

EV-805 Frequently Asked Questions

How many electrodes can the EV-805 run at once?

The EV-805 has four output channels. With one electrode pair connected to each active channel, up to eight electrodes can be connected at one time. The retail kit contains 24 pads, so the number supplied is greater than the number used simultaneously. 

Is the EV-805 a four-channel or dual-channel TENS/EMS unit?

It is a four-channel unit. Each of the four channels has its own intensity adjustment. 

Is the EV-805 wireless?

No. The battery is rechargeable, but stimulation is delivered through four conventional lead-wire connections. 

Does the EV-805 have preset programs?

Yes. It has 24 presets, divided into 12 TENS programs and 12 EMS programs, in addition to its adjustable TENS and EMS modes. 

Can the EV-805 provide TENS and EMS at the same time?

The EV-805 provides both modalities, but the selected operating modality applies across the device; it is not a simultaneous TENS-on-one-group/EMS-on-another-group system. The two timers control treatment duration for CH1–2 and CH3–4 rather than selecting different modalities for those groups. 

Is the iStim EV-805 an over-the-counter device?

Yes. The FDA/NLM GUDID record lists iSTIM EV-805 as an over-the-counter device and associates the model with FDA premarket submission K201335. 

Important Use Information

Use the EV-805 only according to the instructions and safety information supplied with the current device. Electrical stimulation is not appropriate for every user or every electrode location. Review the manufacturer's current contraindications, warnings, electrode-placement instructions, and operating directions before use.