Distance:24-40cm Estimate working hours: about 3 hours Accessories:2 batteries,1 universal charger Advantage: 1.Heat mobile phone model, not easy to be doubted if putting on the table 2.Open camera by clicking the icon on the phone screen,single operation. 3.Can with all kinds of latest poker analyzers. Working Procedure: The user just need to enter the phone main interface,click the Android robot icon, that the camera is opened. Then the marked cards need to be scanned in the correct distance.All right, the analyzer will report the poker game result to the user within 0.3second so that the user can decide to continue or give up the game.