Mr. Heater BOSS-XW18 Basecamp Battery Operated Shower System 17,000 BTU per hour Flow rate - .66 - 1.18 Gallons per minute For use with propane gas, water can be increased by up to 42 degrees f above source water temperature Built in rechargeable battery powers pump for 40 minutes of run time Complete kit includes - quick connect shower head and pump assembly Flow Rate (Gal/Min): Minimum Flow 2.17L/min to Maximum 3.0L/min DC Charge: 8-10 Hours AC/ 4-6 Hours DC Fuel Type: Propane Battery Type: Sealed Lead Acid Complete kit includes - quick connect shower head and pump assembly and dc adaptor