Scubajet is the world’s smallest & most versatile water jet system. The PRO Battery Housing Tube can fit as many as 2 smart stackable batteries (airline-compliant), each taking about 1.5 hours to fully charge (you can charge as many as 4 at the same time). These 2 batteries are coming as standard equipment for the SCUBAJET PRO Underwater Kit. The PRO Battery Housing Tube can always be replaced with the PRO XR Battery Housing Tube + 2 extra smart stackable batteries (not standard), this will allow you to double your range by having as many as 4 smart stackable batteries with a total number of 4 hours for the battery autonomy. The SSC connects and powers accessories wirelessly, accessories such as the Dual Hand Controller (Digital Dashboard) which comes as standard equipment for the SCUBAJET PRO Underwater Kit. The Dual Hand Controller provides an intuitive and variable operating concept and it can be used for Scuba Diving, Swimming/Snorkeling, and for Free Diving. Scubajet Dashboard shows you the important information you need such as Remaining Time, Battery Status, Depth Gauge, Water Temperature, and Speed. The rail is a versatile mounting system for essential accessories such as the GoPro. Optional high-tech LED light illuminates your night adventure. While diving, it can reach depths of 60m.