Sinns EZM (Einsatz Zeit Messer) watches were always dedicated for professionals who need to depend on their watch, like firefighters They need to know how long one can stay in a building burning with all the smoke (even with air tanks), to take someones pulse etcetera. While Sinn used to have the EZM4 for firefighters, it ceased production a while ago. Now, Sinn introduces the EZM7.Click here to read my article on the EZM7 on MotoringExposures Wednesday Watch.