The AquaVac 250Li cordless robotic cleaner provides superior performance without the hassle of tangled cords or getting stuck. Its extended battery life lasts up to two hours -- 25% longer than most other cordless cleaners. A large debris canister adds significant capacity, reducing the need for frequent emptying. A patented drive system provides complete coverage in above-ground and most flat-bottomed, in-ground pools. The convenient floating retrieval string allows for easy removal from your pool.