How long should i use it each time?
20mins

How long will it take it see an effect?
About 3 months, you will be able to see a change of your body.

When should i use it? Gym? Running?
You can use this EMS trainer anytime, anywhere. The EMS trainer will use electrical waves to stimulate and exercise the muscles when you are working/watching a movie/ reading a book/doing housework, etc.

How long can the gel patches last?
About 30 times, if you use and maintain them in the right way.

How to maintain them in a right way?
Clean/dry your skin before using;Stick them back to the cardboard after using.