Output power:300w Flash guide no.:55GN Out control range:1/32-1/1(stepless power control) Modeling lamp:150w Recycling time:0.8-2.5s Color temperature:5600K Flash duration:1/1800-1200s Recycling indication:LED/Buzz/Modeling light indicatioin Working voltage:170v-240v(America:110v) Triggering mothod: Photocell/SYN cable/Test button Triggering voltage:5v Cooling fan:Yes Technical speciality:Flash auto purge/has the function of wireless remote control