The YAMAHA 220Li Seascooter features the power and convenience of a Lithium Ion battery with 2 level rotational speed control. Save your energy and cruise the underwater world with speeds up to 3.1mph (5km/h).Easily swap optional batteries for multiple dives.• Run up to 60 min with normal use• Rated to 100ft / 30m• Speed up to 3.1 MPH / 5 KM/H• 2-level rotational speed control• Battery level indicator• Superior flood prevention system• Powered by high performance replaceable Lithium Ion battery (Upgradeable 500W or 350W battery available)• Automatic buoyancy adjustment system (optional ballast weights for customization sold separately)• Weight only 19 lb / 8.6 kg including battery