Dolphin DX4S Automatic Robotic Cleaner with IntelliScan Technology - $50 Mail-In Rebate Available IntelliScan Technology analyzes your pool surface to make cleaning as efficient as possible. 2.5 hour cleaning cycle and swivel cable reduces knots, kinks, and tangles. Weekly timer schedules the DX4S to automatically clean your pool at your convenience! Quick-release dual level filter cartridge remote ready (remote sold separately). To claim your online rebate, be sure to enter U-LPSWDX4S in the coupon code field on the Maytronics website.