The S-3500 Electronic Muscle Stimulator is designed for

ease of operation. The S-3500 provides 3 pre-programmed selector settings which save valuable treatment time. The S-3500 has a pulsed uniphasic waveform and a fixed pulse duration on each of the settings to provide for a comfortable and effective muscle stimulation and contraction, including large muscle groups, (i.e. quadriceps and trapezius) with a minimal amount of output current (0-25 milliamps in normal use). Soken is backed by a one year warranty and years of customer satisfaction.

Mode Selector Settings:

#1. Constant High Frequency: Variable pulses per second (200 to 50pps.) dependent upon output level for enhanced comfort.

#2. High Frequency with Preset Ramp Duty Cycle:

Variable pulses per second (200 to 50pps) dependent upon output level. Duty Cycle Mode #2: Output ramps up to set intensity. Remains at set intensity "ON-Time" for 8 seconds. Output ramps down to 0; "OFF-Time" and remains at 0 for 2 seconds; cycle then repeats.

#3. Constant Low Frequency: 2 pulses per second.


  • 1 Year Unlimited Warranty
  • Solid State Circuitry
  • Pulsed Uniphasic Waveform
  • Pulsed Duration: 500m sec. /1000m sec.
  • Power Supply: 4 size C-cell Alkaline batteries
  • Maximum unloaded output: 170 volts (± 10%)
  • Maximum loaded output (w/skin impedence) 105 volts
  • Voltage output is controlled by the OUTPUT dial calibrated on a vernier scale of 0-100
  • Selection of 3 pre-set treatment modes to include preset ramp duty cycle at mode #2
  • 0-30 minute silent timer
  • Positive and Negative Polarity switch
  • Treatment pads-2 standard, 4-8 pad capability w / bifurcator
  • Dispersive pad jack
  • Output level light, ON-OFF power light

Dimensions: 8"W x 3 "H x 7"D

(21.9cm x 8.3cm x 18.5cm)

Weight: 6 lbs. 4oz. (2.87Kg)


The S-3500 includes an instruction manual, a warranty card, 2 treatment pads, 1 dispersive pad, 1 lead wire, 1 dispersive lead wire, 2 Velcro straps, & 4 C-cell batteries.

CAUTION: Federal Law (USA) restricts this device to sale by or on the order of a qualified practitioner or qualified physician. EMS devices should be kept out of the reach of children.

Consult instruction manual for proper use of this device.


Electronic Muscle Stimulators (EMS) should not be applied where stimulation in not desirable; for example:

  • High fever, tuberculosis, malignant tumor, serious injury.
  • Hemorrhage, expectorant bleeding, hematemesis.
  • Radiation sickness or injury.
  • Persons with pacemakers or other heart conditions.
  • Avoid use in the areas of the brain and spinal column.
  • The safety of using EMS during pregnancy or over long periods of time is not established,
  • Caution should be used in the transthoracic application of EMS devices.