U-Probe, 24ch, 20µm electrode diameter, 100µm electrode spacing, 100mm total length(33mm; 360µm dia reinforcement tube); 210µm probe dia; 1x CON/32m-V connector interface; 360µm tip to 1st site; Channels 7, 11, 13, 15, 17, 21, and 22 not working.