This super sleek machine has 2 channels and 9 different mode patterns. It has a twist dial intensity control for each channel separately allowing max sensitivity control. It uses 4 AAA  batteries (not included!). The best we have for therapeutic purposes and especially for sensory stimulation because of the added feature of being able to speed up or slow down the pulses on any given program.  Much easier to "get there"...

Very easy to use! Note: it has an auto-shutoff timer at 20 minutes for general safety purposes and will need to be turned back on for extended use. 

This box uses standard 2.5mm TENS lead cables, 2 of which are included with your purchase as well as 1 sheet of standard electrode pads.