For an unforgettable time outdoor with the WaveJet ($4,500), just add water. This patented Personal Water Propulsion engine is engineered for use in a number of watercraft, including kayaks, surfboards, SUPs, kiteboards, rescue boards and light boats. The WaveJet is equipped with a rechargeable twin-lithium ion battery pack that provides enough power for a max thrust of 20 pounds and uninterrupted run-time of over 30 minutes.