6' LED SCREEN, dual tunnel display, auto range, auto gain, detecting range: 0-300m. Screen: 6-inch TFT color LCDRange: 0-300mAuto range: YesAuto gain: YesBrightness adjustment: 6 stagesDisplay speed: 8 stages including: *4, *2, *1, /2, /4, /8, /16, 0(stop)Background Color: Black Blue Light blueOperation Frequency: 200KHz Transmitting Power: 300W (virtual value) 6' ECHO SOUNDER