The Yongnuo 600EX-RT II is nearly identical to the Canon 600EX-RT II. There are minor differences but the specs, functions, and menus are essentially the same. It uses wireless two-way radio communication to operate as a master or a slave unit. The guide number is 197 ft./60m at ISO 100. It is compatible with the Canon ST-ET-R3 transmitter and all the Canon camera bodies we offer.
Requires 4 AA alkaline batteries, not included.
Accessories supplied with flash:
Soft padded case
Multi-flash scenarios: We have not fully tested this flash in combination with other Canon flashes, therefore we recommend using all Yongnuo flashes or all Canon flashes for multi-flash configurations. Unexpected results may occur if flashes are mixed.