range: 0-800m, power: 300W, screen: 6',dual channel Confirm to "Rules of technology of inland waters ... mode , Auto zoom mode, Manual zoom mode Technical SpecificationScreen: 6-inch TFT color LCDRange: 0-800mAuto range: YesAuto gain: YesBrightness adjustment ... : 6 stagesDisplay speed: 8 stages including: *4, *2, *1, /2, /4, /8, /16, 0(stop)Background ...