It can make them float, prevent the GoPro Hero 2 or Hero 3 camera from sinking. So you don"t have to worry about losing it in the water. * Great for snorkeling,scuba diving,surfing,wakeboarding and any other deep water activities. * A spare waterhousing backplate is included. * Easy to spot,flotation backdoor lets your HD Hero2 Hero3 camera float below water. * Industrial strength 3M VHB adhesive backing attaches the float directly to the HD Hero waterhousing backdoor.