Also for divers as Blitzer interesting.

I bought the Powerflare as Blitzer for night dives and could test him last week. Tied on a lower of 3 meters at a buoy of Blitzer from the surface is good to see. Just as under water. I had also tied a white Blitzer at the buoy. I must say in troubled water one sees the blauben Powerflare very good, the water you can see a white klren Blitzer better.

Otherwise, the workmanship is very good, I like to believe that one could also drive a car over it without something to happen.

Only when the charger slightly better processing would be nice.

Addendum:

Now, after some use, I've also done a test to 15 m. Here the Powerflare unfortunately "flooded" me. The water is probably penetrated through the charging coil. I've turned the screw and let the powerflare one week dry, then sealed to the edges of the screws with silicone and now he goes back and also has a test persevered to 20m :-)