Check if the device is on the « off » position.
Open the battery cover at the back of the Farmadolor, insert 2 button cells CR2450 in the slot then close the cover observing the proper polarity (+/-).
Never mix old and new batteries. Do not try to operate the device with other power source.
For an optimum use of your device, it is recommended to use good quality batteries.
Low batteries: the three (3) indicator (1, 2 and 3) light steadily.