AerWo Electric Water Bottle Pump Dispenser with Rechargeable Battery Drinking Water Bottles Suction Unit Water Dispenser Kitchen Tools White Drinking Water Pump is suitable for buckets that the caliber within 5.5cm. One key operation, watertight and easy to use. Built-in rechargeable battery, can used for 30-60 days once fully charged. 270 degree rotation, adjust the direction of water. Configured a power adapter and portable battery box, plug and play. ABS shell, food grade silicone tube, non-toxic and safe. Super mute, low noise.