Features:
YONGNUO YN600EX-RT- Global First Aftermarket Radio?Transmission Speedlite!
-Supports RT System:
One YN600EX-RT can be used as on-camera master unit and?remote slave unit of Canon's RT system｣ｬand supports Gr?grouping mode.
-Fully Compatible with YONGNUO YN-E3-RT｣ｬCanon's 600EX-RT/ST-E3-RT Wireless Signal:
One YN600EX-RT can be used as master unit to trigger?YONGNUO YN600EX-RT｣ｬ Canon's 600EX-RT｣ｬand live display?the flash groupings of slave unit and recycling information; One?YN600EX-RT can ]respectively receive the wireless signal of?
master unit YN600EX-RT｣ｬYN-E3-RT｣ｬCanon｡ｯs 600EX-RT/ST-E3-RT｣ｬ realizing remote TTL｣ｬ M and Gr flash.
-High Guide Number｣ｬ Supports High-speed Sync:
GN60@ ISO100｣ｬ 200mm; supports high-speed sync TTL｣ｬ?manual flash｣ｬ Gr grouping flash｣ｬ the highest synchronous speed?can reach 1/8000s.
-Supports USB Firmware Upgrade:
The YN600EX-RT equipped with the USB interface｣ｬ supports?firmware upgrade｣ｬ the users can download the upgrade?firmware through the Yongnuo official website to upgrade the?flash.
-Supports Wireless Optical Slave function:
The YN600EX-RT supports YONGNUO｣ｬ Canon's and Nikon's?wireless optical master signal｣ｬ supports S1 and S2 pre flash?cancel mode.
-Support Auto/Manual Zooming:
The YN600EX-RT supports auto and manual zooming｣ｬ the flash?coverage can be changed between AUTO｣ｬ 20~200mm.
Settings Save Automatically｣ｬ Supports Custom Settings (Fn).
The parameters on the flash will automatically save when the?flash turned off; the users can customize setting the flash?function as needed.
-Ultrafast Charging Recycle System｣ｬ Supports External Power?Supply.
-Equipped with Big Size LCD Display Screen｣ｬ Standard PC?Synchronous Interface.

Specifications:
Circuit design: Insulated Gate Bipolar Transistor (IGBT)
Guide No.: 60 (ISO 100｣ｬ 105mm)
Flash mode: TTL｣ｬ M｣ｬ Multi｣ｬGR
Triggering mode: Camera set-up｣ｬwireless master mode｣ｬ?wireless slave mode｣ｬ Sc｣ｬSn｣ｬ S1｣ｬ S2
Zoom range: 20｣ｬ 24｣ｬ 28｣ｬ 35｣ｬ 50｣ｬ 70｣ｬ 80｣ｬ 105｣ｬ135｣ｬ200mm
Vertical rotation angle: -7~90 degrees
Horizontal rotation angle: 0~360 degrees
Power supply: 4* AA size batteries (not included)
Lighting times: 100~1500 times (AA alkaline cell used)
Recycle time: approx. 3s (AA alkaline cell used)
Color temperature: 5600k
Flash time: 1/200s~1/20000s
Flash control: 8 levels of output control (1/128~1/1)｣ｬ 29 levels of?fine tuning
External interface: hot shoe｣ｬ PC port?
Wireless triggering distance: 20~25m indoor｣ｬ 10~15m outdoor
Optical transmission triggering distance: Up to 100m
Additional features: master flash｣ｬ high-speed sync｣ｬsecond-curtain sync｣ｬ FEC｣ｬFEB｣ｬFEV｣ｬ The electronic flash head?zooming｣ｬ sound prompt｣ｬ automatically saving setting｣ｬ PC port｣ｬ?power saving mode｣ｬ over heat protection and advanced?options setting
Item size: 20 * 7.5 * 6.5cm / 7.9 * 3.0 * 2.6in
Item ?weight: 420g / 14.8oz
Package size: 22 * 10.5 * 9.5cm / 8.7 * 4.1 * 3.8in
Package weight: 636g / 1.4Lbs

Package List:
1 * Speedlite
1 * Mini Stand
1 * Protecting Bag
1 * User Manual(Chinese & English)