yeah but that's written on their website before you purchase it.
"Attention: GT-31/BGT-31 unit MUST be used in a waterproof housing or bag when used in watersports. The device itself is waterproof but it will not withstand the use of in extreme sports. IPX7 is tested in the still water for 30 minutes at a depth of 1 meter."
www.locosystech.com/en/category/index.htmlhighlighted in a bright red box.
