Made by Folsom Electric Company, this unit generates a stimulating electrical current of similar intensity and flavor as the signal put out by the TENS unit. This Folsom box has two channels instead of one, so you can use two pairs of electrodes (a total of 4) at once.
The small battery compartment is accessible using a small sliding door, so you won't need a screwdriver to change it.
There are four control knobs, two knobs control one channel; for instance the second intensity knob controls the second channel, instead of fine tuning the first one. Each channel also features a red button, which functions as a cut-off switch for that channel.
The Folsom Electric box can be used with an optional adapter unit which plugs into the wall, or you can go cordless with a 9-volt battery. The set includes two pairs of output leads.
AC Adapter sold separately.
Folsom Electric Company offers a lifetime warranty on all their power boxes and accessories.