Brandel stimulators are fully programmable, and offer a choice of either mono or biphasic current output with programmable waveshape over a range of 0-200 milliamps – or up to 100 volts depending upon resistance – per channel. Each channel is individually regulated and adjustable. Front screen displays bar graph for output of all channels at once, or digital scope of any single channel. Models for Stand-Alone Use ES-202 Electrical Stimulator, w/o probes 1-2 channels ES-206 Electrical Stimulator, w/o probes 1-6 channels ES-212 Electrical Stimulator, w/o probes 1-12 channels ES-218 Electrical Stimulator, w/o probes 1-18 channels ES-220 Electrical Stimulator, w/o probes 1-20 channels Above models may be ordered alone or with selected Suprafusion Components. Models for Use with Brandel Suprafusion Systems ES-206 Electrical Stimulator, with probes 1-6 channels ES-212 Electrical Stimulator, with probes 1-12 channels ES-218 Electrical Stimulator, with probes 1-18 channels ES-220 Electrical Stimulator, with probes 1-20 channels