Technical specification:
Voltage Control
Pulse Rate: 1 to 120Hz
Pulse Duration: 50 to 400μS
Signal Formation: Bipolar square pulse
Intensity Amplitude: Adjustable 0-50 step. Max output 100V peak to peak (8.0 V  r.m.s)in to 500ohm load each channel
Power supply: 4 x 1.5 V AAA batteries
Dimension: 136 (H) x 60 (W) x 23 (D) mm
Weight: 95g 

Working environment:
Temperature: 5 to 40 deg. C
Relative humidity: 30%RH to 80%RH

Storage environment:
Temperature: -10 to 55 deg. C
Relative humidity: 10%RH to 90%RH

Accessories:
Stimulator unit
English operation manual
Two cables for the electrodes
Two pairs of electrode pads (40 x 40mm)