This Floater attachment adds buoyancy to the Whiteshark Tini Underwater Scooter, so you won't have to worry about losing the device to the seas! Simply slide the floater onto the top of your WhiteShark Tini and screw in the provided screw to firmly secure the attachment. Then be sure to also screw in the included mount for your smartphone or action camera onto the back of the floater.(Please Note: Sublue WhiteShark Tini Underwater Scooter is NOT included with this product, but can be purchased separately here!)