Check the listing for details. Canon Speedlite Transmitter ST-E3-RT (Ver. 3). Color: Black, Condition: New. Listed at 299.00 USD. Authorized Dealer Canon Speedlite Transmitter ST-E3-RT (Ver. 3)Manufacturer Part # 6651C001 Overview:The Canon Speedlite Transmitter ST-E3-RT (Ver.3) provides continued support of Canon camera's that feature a standard hot shoe (not compatible with multi-function shoe equipped cameras). Many of the most popular features carry over to version 3, such as wireless rear curtain synchronization to capture ambient light trails and convey a sense of speed for moving subjects. An expansive minimum output range (down to 1/8192 power), and FE Memory as part of the radio transmitter so you can lock-in an E-TTL flash exposure level, even in complex multi-flash set-ups, and continue to use it for the same scene or subject. Radio controlled, two-way wireless transmission up to 98.4 ft., up to five groups or fifteen individual Speedlites, a dot matrix LCD with backlighting, intuitive controls and more. Features:High-Performance Hot Shoe Contacts for Reliable Information Transmission and Operation.Up to 5 groups, or 15 Individual Flashes can be Controlled via one Transmitter.Supports E-TTL II Flash, Manual Flash, Stroboscopic and Auto External Flash Metering.Dot Matrix LCD Panel displays all pertinent Information Simultaneously and Backlit Control Panel means Easy Operation.8 Types of Custom Functions, 3 Types of Personal Functions.High-performance Hot Shoe Contacts for Reliable Information Transmission and Operation.Wireless Rear Curtain Synchronization.Minimum Output Range of 1/8192.FE Memory built-in so you can lock-in an E-TTL flash exposure level.Package Includes:Canon Speedlite Transmitter ST-E3-RT (Ver.3)Soft Case (for Speedlite Transmitter ST-E3-RT)1-Year Limited Canon Manufacturer Warranty