OPTIMIZED POWER OUTPUT - Delivers reliable flash performance with an approximate Guide Number of GN12 @ ISO 100, ensuring consistent and effective lighting for various shooting scenarios. RAPID RECYCLE TIME - Experience minimal downtime with a recycle time of approximately 3 seconds at full power, allowing you to capture more shots in quick succession. TTL FUNCTIONALITY ENABLED - Achieve perfectly exposed images effortlessly with TTL (Through-The-Lens) metering, automatically adjusting flash output for optimal results with compatible cameras. COMPACT AND LIGHTWEIGHT BUILD - Designed for portability, this flash unit weighs only 34g (approximately 1.2 oz) and measures 57 x 40 x 22mm, making it easy to carry on any shoot.