You should use all pads together to your body first ,then turn on the machine, it might work. Or it would turn off in 3 seconds if the pads slip.
And please remember turn the switch in "off" before you connect it with the power.
Treatment can not be effected unless all of the electrodes are placed .
Please do NOT use batteries and USB Power Adapter at the same time.
3 x 1.5V AAA batteries (Batteries Not I