tuning live without effects-box?

[smirky]

sorry, may be a stupid question, but how do I tune during a gig withouth the help of an fx-box?
are there tuners with bypass functions on the market that do the job?
thanks for help, smirky

 

[Shailat]

There are these realy cool tuners that you put on the body of your guitar and it sticks like a magnet. Its small and very usefull.