The world's only desktop on demand hydrogen supply system for refilling Hydrostik PRO metal hydride cartridges (B8R06177).By generating hydrogen through water electrolysis Hydrofill enables homes and classrooms to become energy self-sufficient. Perfect for next generation science kits and engineering projects.Hydrogen is stored in small cartridges (Hydrostik PRO - available separately) at low pressure. During refuelling the Hydrofill PRO produces Hydrogen gas which is sent into the cartridge at high pressure and is absorbed onto the surface area of a special metal alloy which is contained inside the cartridges thus becoming a solid (hydride). When connected to the fuelcell the HYDROSTIK or HYDROSTIK PRO cartridges slowly release hydrogen using a heat exchange process with the ambient temperature.Refilling Time for Hydrostik PRO: Approx. 4 - 6.5 hours (at 25°C ambient temperature)Contents:Hydrofill PRO UnitAC-DC Power AdaptorUser ManualSpecifications:Stack Type: Proton exchange membrane electrolysis cellRated Power: ≤23WInput Voltage: DC: 10V - 19VWater Input: Deionised or Distilled Water onlyWater Temperature: 10 - 40°C (50 - 104°F)Water Consumption: Approx. 20ml/hr Hydrogen Output Pressure: 0 - 2.8 MPaG (0 - 406 PSI)Hydrogen Generation Capacity: Up to 3L/hr (0-183 in /hr)Hydrogen Purity: 99.99%Compatible Cartridge: Hydrostik PRODimensions: (W)145 x (D)153 x (H)208mmWeight: 1.8Kg ±5% (3.97Lbs ±5%)Associated Product:Hydrostik Pro - B8R06177