WIRELESS AND SAFER CLEANING: Say goodbye to wires thanks to the Aiper Pool Vacuum's 100% cord-free design. No worry longer about cord entanglement and the risk of power short-out. It lasts up to 50 mins ideal for round ABOVE-GOUND pools (up to 30' diameter), and IN-GROUND flat bottom pools (ONLY ONE DEPTH, up to 15' X 35')