Featuring a built in rechargable Lithium-Ion battery, simply immerse pump in water and hang or attach shower head to a suitable surface for a quick and easy shower. Can be used in all temperatures that the human body can stand. Do not immerse in boiling water. Features One touch operation Cordless and portable Car adaptor/USB cable recharging Powered by built in Lithium-Ion battery Specifications Model: COMP25345 UPC/ISBN: 9312652101167 Water Flow Rate: 2L/minute (average) Battery: 3.7V 2200mAh Lithium-Ion rechargeable battery Hose Length: 2m Run Time: 60 minutes (maximum) Recharging Time (approximate): 2-5 hours Warranty 1 year manufacturer's warranty