Thanks to the cordless design . Wybot Osprey 300 II robotic pool cleaner is simple and easy to make your pools sparkle again. The pool cleaner boasts a substantial battery capacity of 6600mAh . providing an impressive runtime of up to 130 minutes. And it features a fast charging time of only 3 hours . eliminating the frustration of long charging periods. With a powerful 45W brushless motor . it can efficiently remove various types of debris from pools . including sand . dirt . leaves . twig and dust. It can automatically return to the shore when the battery runs low or working is completed.