According to the GoPro site it's waterproof up to 10'.

Wi-Fi Remote:

Control up to 50 cameras at a time from up to 600’/180m in optimal conditions
Enjoy full camera control, including On/Off, Shutter and Settings control
LCD screen mirrors your camera’s LCD status screen
Attachment strap, key ring, and charging cable included
Wearable and waterproof to 10’/3m

 

Ok, so the GoPro remote IS the second coming of christ.