Can you plug two flash heads into one battery?
Chenine Monet J
What is the Working Voltage on AC mode and DC, ist 220v or 110v?
Dose it fit for Bowens speed ring?
This one works on 110 volts In USA,and the DC output is 12 volts from the battery. The speedring will fit Bowens yes. Its a great light,Good luck
So this comes with a portable battery? If so, how long does it last?
Depends, if the unit is turned up to maximum power, it would give you 90 to 110 shots average. The lower the setting the higher number of shots you get. I tested it, and at 1/4 of power gave me 330 shots aprox.-