What are the key features and specifications of the Yongnuo 600EX-RT flash?

The Yongnuo 600EX-RT flash is a versatile and powerful external flash unit designed for professional photographers. It features a guide number of 60m at ISO 100, a zoom range of 20-200mm, and supports high-speed sync and stroboscopic flash modes. The flash is compatible with Canon's wireless radio transmission system and has a built-in 2.4G wireless receiver for off-camera flash control. Additionally, it has a color temperature of 5600K and can be powered by 4 AA batteries or an external power source.