Vital Stim EMS 4000

Manufacturer's Description:   Four Channels, 12 Electrode Pads (8 Active at a time), Channels Isolated  Waveform: Biphasic or Mono-Phasic  Frequency: 2 - 140 Hertz,  Reciprocation: Yes (for supersetting muscle groups),  Pulse Width: 300 microseconds,  Ramp Time: 3 Seconds,  Contraction Time: variable 3 to 45 Seconds,  Relaxation Time: variable 3 to 45 Seconds,  Power Output: 0 - 34.3 microColumbs (100 Volts),  Dimensions: 3 1/4"(H) x 8" (W) x 8" (L),  Fuse: 250V 4A slow blow