digital tens machine.timer: 01 - 99 minute programmable Program mode:
burst mode, continuous, p.w.m, sweep mode, combi mode Frequency: 2hz -
10hz - 50hz - 100hz - 150hz.,Intensity: 0 - 100 mhz, gel bottle 250ml 12
Channels, Material Metal. Reasonable Price Easy to use is this 4 channels, It
features adjustable const ration and relaxation time.