The iM30 Mini Flash is ideal to use for the photographers who are continuously on the go considering that it operates on two AAA batteries and provides amazing power in a small, portable package At full power, the iM30 recycles in just 3.6 seconds, making it nearly instantaneous to fire again and suitable for fast-paced shooting situations Experience up to 230 full-power flashes on a single charge to make sure you 'll feel secured in any important moments when shooting The iM30's green light solidifies after turning on, indicating that the flash is fully recycled and prepared for testing. This lets you quickly verify your settings by pressing a button Without the need for wireless triggers, S1 mode on the iM30 converts it into a secondary flash that fires in time with your primary flash, making it simple to set up multiple flash settings