The link to Yamaha RDS200 Seascooter has been copied
Designed for both recreational divers and snorkeling enthusiasts, the scooter is rated to a depth of 65'. Run the scooter up to 40 minutes with continuous use, and enjoying floating through the water at a speed up to 2 MPH. Powered by a sealed 12V lead acid battery that recharges in 4 - 6 hours. Removable buoyancy control chamber. Note: Scooter is constructed for use in saltwater and may have less buoyancy in freshwater. Weighs just 13 lbs. 24" x 15.2" x 12.3".