1. Safety & Health : BPA drinking water dispenser, food grade silicone hose, 304 stainless steel, high density ABS plastic, no toxic, and no smell. It is good for home, offices, camping and outdoor 2. USB Rechargeable Battery : Built in rechargeable 1200mAh battery. can used about 30-40 days or around 4-6 bottles of 5 gallon water once full charged. no need to charge every day.convenient and portable utility for any occasion. 3. Water Quality Monitor : The USB rechargeable water bottle pump has built-in an intelligent water quality tester system, It has three-color light indicators can feedback the water quality in real-time. With the TDS water quality monitor, you can know clearly whether the drinking water is or not. 4. High Compatibility : It is basically fits almost every water jug which has 2.16 inches (5.5 cm) neck (the cap diameters between 55-60mm). its wireless utility makes it easy to clean, use, and store.