Twin Stim IV Portable TENS Unit | Rechargeable TENS + NMES Device

InTENSity Twin Stim IV TENS/NMES Unit – DI2717

The InTENSity Twin Stim IV DI2717 is a rechargeable, dual-channel electrotherapy unit combining TENS and NMES stimulation in one portable device. Designed for prescription use under the direction of a qualified healthcare professional, the Twin Stim IV provides preset body-area programs plus manually adjustable settings for treatment plans that require sensory-level TENS, muscle-stimulating NMES, or access to both modalities from a single unit.

With 36 program selections, independent intensity control for two channels, a large LCD, rechargeable lithium-ion battery, electrode-load detection, and treatment-use tracking, the Twin Stim IV offers substantially more programming flexibility than a basic TENS unit while remaining compact enough for portable clinical or home use.

Model: DI2717
GTIN-14: 00092237614143
UPC: 092237614143
Channels: 2
Modalities: TENS + NMES
Power: Rechargeable lithium-ion battery
U.S. status: Prescription device

Why Choose the InTENSity Twin Stim IV?

The Twin Stim IV is designed for users who need both TENS and NMES without moving to a larger multi-modality electrotherapy system.

TENS + NMES in One Device

TENS and NMES use electrical stimulation for different treatment objectives. The Twin Stim IV places both modalities in one two-channel unit, allowing a clinician-directed program to use either mode without requiring separate devices.

For a detailed explanation of how these modalities differ, see our TENS vs. NMES guide.

36 Program Selections

The Twin Stim IV combines preset and manually adjustable programming across six body areas:

• Neck

• Shoulder

• Hand

• Low back

• Knee

• Foot

Each body-area selection provides programmed treatment options plus a customizable U1 setting, giving the device 36 total TENS/NMES program selections.

Two Independently Controlled Channels

Two isolated output channels allow the Twin Stim IV to operate with one or two electrode pairs. Channel 1 and Channel 2 intensity are adjusted independently, making it easier to accommodate different electrode locations or stimulation requirements within the prescribed treatment setup.

Rechargeable Portable Design

The integrated rechargeable lithium-ion battery eliminates the need to continually replace disposable batteries. The compact unit also includes a belt clip and carrying case for convenient storage and transport.

Treatment Tracking

A built-in patient compliance meter records treatment-use information, providing an additional tool for prescribed home electrotherapy programs where treatment history may be useful to the supervising clinician.

Twin Stim IV Specifications

Twin Stim IV vs. Other TENS/NMES Units

Choosing an electrotherapy unit should be based on the modalities, number of channels, programming flexibility, and treatment requirements prescribed by the healthcare professional.

When the Twin Stim IV Makes the Most Sense

The Twin Stim IV is a strong choice when the prescribed treatment requires:

• Both TENS and NMES

• Two output channels

• Rechargeable operation

• Preset body-area programming

• Manually adjustable stimulation parameters

• A compact, portable format

If the treatment plan requires interferential current or Russian stimulation, consider the InTENSity Select Combo II. If four channels or up to eight electrodes are needed, compare the Twin Stim Plus DS5402.

What's Included with the Twin Stim IV?

Replacement Electrodes for the Twin Stim IV

The Twin Stim IV uses reusable self-adhesive electrodes connected through its lead wires.

For direct replacement options, see:

• InTENSity 2" × 2" White Cloth Electrodes

• Balego TENS, NMES & FES Electrodes

• All Electrotherapy Electrodes

Electrode size, placement, and configuration should follow the device instructions and the treatment plan established by the prescribing or supervising healthcare professional.

Twin Stim IV Setup & Troubleshooting

For operating instructions, program selection, charging, intensity controls, electrode connection, safety-lock behavior, compliance-meter functions, and common troubleshooting steps, see our dedicated InTENSity Twin Stim IV setup and troubleshooting guide.

Keeping those instructions in the dedicated resource guide allows this product page to focus on device selection, specifications, accessories, and purchasing information.

Frequently Asked Questions

Is the InTENSity Twin Stim IV the DI2717?

Yes. DI2717 is the model and manufacturer SKU for the InTENSity Twin Stim IV TENS/NMES unit. Its single-device GTIN-14 is 00092237614143.

Does the Twin Stim IV provide both TENS and NMES?

Yes. The Twin Stim IV combines TENS and NMES stimulation in one two-channel device.

Is the Twin Stim IV an OTC TENS unit?

No. The DI2717 is identified in FDA device records as a prescription-use device rather than an over-the-counter device. U.S. purchasers should follow applicable prescription requirements.

How many programs does the Twin Stim IV have?

The unit provides 36 program selections across its TENS and NMES modes, combining preset body-area programming with manually adjustable U1 selections.

Can I manually adjust the Twin Stim IV?

Yes. In addition to its programmed selections, the Twin Stim IV provides manually adjustable parameters through its U1 programs. Adjustments should remain consistent with the prescribing professional's instructions and the manufacturer's directions for use.

How many electrodes can be connected?

The Twin Stim IV has two output channels. Each channel uses a lead-wire pair and normally operates with two electrodes, allowing four electrodes to be connected when both channels are used.

Are electrodes included?

Yes. The standard kit includes four reusable 2" × 2" electrodes along with two lead-wire sets.

Is the Twin Stim IV rechargeable?

Yes. DI2717 uses a rechargeable lithium-ion battery and includes charging equipment.

Does it provide interferential or Russian stimulation?

No. The Twin Stim IV is a TENS/NMES device. If the prescribed treatment requires IFC or Russian stimulation, compare the InTENSity Select Combo II or four-channel Twin Stim Plus DS5402.

Where can I find operating instructions?

See Balego's Twin Stim IV manual and setup and troubleshooting guide for detailed operating information.