Features:
On and off camera E-TTL flash.
Master and slave mode.
High speed sync: 1/8000s.
High guide number: GN 62(ISO 100， 200MM).
Autofocus auxiliary functions.
Automatic zoom functions， flash zoom position can be back and forth with the change of the focal length of the lens.
Supporting the access to the Canon menu.
Large size LCD display.

Specifications:
Guider number: GN62 (ISO100， 200mm)
Wireless Flash: Radio transmission Slave， Optical pulse transmission Master/Salve
Flash mode: ETTL， M， MULTI
Zoom range: Auto， 20~200mm (When using wide angle dispersion plate is 14mm)
High speed sync: 1/8000s
Master flash: Master optical pulse signal transmission
Slave flash: Optical pulse SLAVE for Canon/for Nikon， light trigger， S1/S2， wireless SLAVE (NEED to upgrade the software first)
Shutter Synchronization: High Speed Sync， Front-curtain Sync and Rear Sync
Flash exposure compensation: Support (with an increment of 1/3 gear in +/-3 gear)
Bracket exposure: Support
Flash exposure lock: Support
Modeling flash: Support
AF Assist-focus: Support
Manual flash: 1/128~1/1 (with an increment of 1/3 gear)
Frequency flash: 1~199Hz
Recycle time: Quick flash less than 2s， ordinary flash less than 3s
Wireless transmission distance: Radio， about 100m; optical pulse， about 20m
Radio transmission channels: Radio， 4~16; optical pulse， 4
Flash ratio: 8:1 ~ 1:1 ~ 1:8
Flash Groups: Support for multiple flash grouping
Power supply: 4 * AA size batteries (not included)
External interface: Hot-shoe， PC synchronous interface， external charging interface， external expansion interface
Software upgrade: Support
Battery life: Flash 100~700 times
Package size: 9 * 11 * 21cm / 3.5 * 4.3 * 8.3in
Package weight: 700g / 1.54LB

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