Studio flash light Features: 1) Output power: 500W 2) Flash guide No.: 72GN 3) Output control range: 1/32 - 1/1 (stepless power control) 4) Halogen modeling lamp: 250W 5) Recycling time: 0.8 - 3s 6) Color temperature: 5,600 ± 200K 7) Flash duration: 1/800 - 1/1200s 8) Modeling light working mode: full power output/proportional flash and modeling light 9) Flash output precision: ±0.1EV 10) Recycling indication: LED/buzz/modeling light indication 11) Working mode: 170 - 240V automatic voltage regulator circuit 12) Flash triggering method: photocell/SYNC cable/test button 13) Triggering voltage: 12V (low voltage trigger) 14) Cooling fan: yes 15) Technical specialty: auto purge