Sorry but I live in the Philippines now and travel a lot around Asia. We see a lot of folks diving to 50M with no tech training.
Here is a photo of one used on a recent dive and it was placed on the line at 110M. Not sure of the brand. I thought you were going to be wearing it or something. I understand your question now.
The one in your photo may be Zeagle branded....this is basically the same unit as my link......
ACR FIREFLY PLUS STROBE FLASHLIGHT COMBO : Discount Marine Electronics - GPS, Fishfinders, VHF
Zeagle Strobe & Flashlight Combo - Online SCUBA Gear