EXO fans were impressed at the high-tech equipment EXO had for their 4th concert.

Each member had a little lightstick-looking pin button in their suit pockets. Chen explained to the crowd that they were little devices for the spotlight to automatically follow the members wherever they moved, so they weren't restricted to where the lights were pre-set, and didn't have to worry about the lights being moved manually to where they were moving.

Looks like EXO's getting really fancy!