Flash Energy: 1200 ws f-stop at 2m (6.5ft), P70 reflector: 64 1/10 (with MobiLED) (100 ISO) Flash duration t 0.5 (t 0.1) Fastest: 1/20,000 s (1/8,500 s ) max. energy: 1/1'000 s (1/350 s) Charging time 0,02 - 1,9 s (Speed Mode 0,02 - 0,9 s) (for 100% of selected energy) No. of flashes per battery charge: Approx. 170 / 230 (Eco-Mode) at 1200 ws, Approx. 50'000 at 4 ws Lamp outlets: 2 outlets with flash cut-off and ECTC Power distribution: Symmetrical and individually asymmetrical Controls: illuminated silicone keyboard, resistant to dust/scratches, LCD display Flash energy control range: 9 f-stops in 1/10 or full f-stop intervals Display in joules or percent (4,5 - 1200 ws) Modeling light: Max. 2 x halogen 100 W or 2 x LED 30 W charge selectable switch-off time setting (10/30/60 s) Operating in continuous light mode over 2 hours Color temperature: ECTC technology (Enhanced Color Temperature Control) for constant color temperature Flash triggering: Manual release button, photocell, RFS 2, sync cable Radio release: Outdoors up to 50 m (164 ft) (possible range up to 300 m / 984 ft) indoors up to 30 m (98 ft) (possible range up to 300 m / 984 ft) Lithium battery: 14.4 V / 6.6 AH Li-FePo4 with integrated battery status Dimensions (LxWxH): 8.3x6.7x9" / 21.08x17.02x22.86 cm Weight: 13.7 lbs / 6.21kg