The ELC Pro HD Compact 500 is one of the worlds most complete, feature rich compact studio flash units. The result of over 25 years experience at the forefront of studio lighting technology. Designed and assembled at Elinchroms HQ in Switzerland the ELC benefits from the highest Swiss specification. Recycling times are lightning fast 0.6s while Swiss precision guarantees consistency of power output and color temperature, shot after shot. Furthermore the super-fast flash durations up to 1/5000s enable you to freeze motion like never before. The ELC is the first unit to incorporate an OLED screen that displays every control for the most professional user experience. As well as Elinchroms stop based power scale, you will now be able to see the power in Joules, flash durations and many other settings. A jog wheel provides easy navigation of the new menu. Note: All ELC Pro HD units are supplied with a glass dome for maximum safety. Features Built-in EL-Sky port receiver for triggering. EL-Skyport with 8 Frequency Channels with 4 Groups. EL-Skyport Speed Sync mode for synchronization up to a 1/320 s on enabled SLR cameras. Intelligent pre-flash detector system to enable the use of ELC units with speed lights. 7 f-stop range. Action freezing flash durations at full power - 1/2330 s. at t.05 - with flash durations up to a 1/5000 recycling times always maintaining best stability. Up to 20 flashes per second. Super balanced color temperature with /- 150K Degree Power Auto--voltage auto-detection: 90-270 V excluding modelling lamp.Low 5 V sync voltage protecting all digital camera systems. Intelligent low noise fan The electronically controlled fan spins slower or faster depending on the internal temperature of the unit. High impact resistant and fire retardant body shell. Accessory bayonet allowing the complete range of light modifiers.