The iA32 Mini Flash is ideal to use for the photographers who are continuously on the go considering that it operates on two AA batteries and provides amazing power in a small, portable package At full power, the iA32 recycles in just 2.5 seconds, making it nearly instantaneous to fire again and suitable for fast-paced shooting situations Experience up to 490 full-power flashes on a single charge to make sure you 'll feel secured in any important moments when shooting The iA32's green light solidifies after turning on, indicating that the flash is fully recycled and prepared for testing Without the need for wireless triggers, S1 mode on the iA32 converts it into a secondary flash that fires in time with your primary flash, making it simple to set up multiple flash settings Having cameras that have pre-flash features, the optical S2 mode enables the flash to operate in TTL pre-flash mode, guaranteeing precise and consistent lighting in every picture you'll take