Audio Systems: Beginner need to know if mic is good enough for gigging..., shure sm57, shure sm58

Question
Microphone sensitivity : 72 db Directivity : Uni - directional Output impedence : 600 ohm Operating voltage : 3v or 1.5v DC Effective distance : 15m

there are the stats....is this microphone good enough for gigging?

Answer
Specs are meaningless without an intent on use. What are you using it for (vocal or instrument)? How much are you paying for it? What is the model number and manufacturer?

That being said the two universal microphones on the planet for live gigs are the Shure SM58 and Shure SM57.