Royal Sovereign portable water dispenser pump is ideal for the home, workplace, schools and ‘on-the-go’, such as at picnics, the beach, camping, sporting events and more! Simply fasten the pump to the water bottle mouth and start pouring. Includes built-in 800mAh rechargeable lithium battery which can dispense water for 30-40 days when fully charged – about 4-6, 6-gallon of water bottles.