Ttl Speedlite Transmitter for Canon (YN-E3-RT)

YONGNUO Speedlite Transmitter YN-E3-RT is a transmitter for wireless flash shooting. It can control up to 5 groups (15 units) of Speedlites that have a wireless multiple flash shooting function using radio transmission.
The transmitter also has dust and water resistance equivalent to EOS-1D series cameras.

Specifications
Type: On-camera Speedlite transmitter
Compatible cameras: EOS type-A camera compatible with E-TTL II/E-TTL autoflash
Exposure control system: E-TTL II/E-TTL autoflash, manual f l a s h, s t r o b o s c o p i c f l a s h, a u t o external flash metering
Only when the flash mode is set to
Frequency: 2405 - 2475 MHZ
Modulation system: P r i m a r y m o d u l a t i o n: O Q P S K, secondary modulation: DS-SS
Channel: Auto, Ch. 1 - 15
Wireless radio ID: 0000 - 9999
Slave unit control: Up to 5 groups (A/B/C/D/E), up to 15 units
Transmission distance: Approx. 100 m
Flash ratio control: 1: 8 - 1: 1 - 8: 1, 1/2-stop increments
Flash exposure compensation: ± 3 stops in 1/3- increments
FEB: ± 3 stops in 1/3- increments (when u s e d w i t h f l a s h e x p o s u r e compensation)
FE lock: Press the camera's , or <*> button
High-speed sync: Provided
Manual flash: 1 / 1 - 1 / 1 2 8 p o w e r ( 1 / 3 - s t o p increments)
Stroboscopic flash: Provided (1 - 500 Hz)
Linked shooting: Provided
Custom Functions: 9
AF assist Beam Emitter: Provided
Firmware update: Provided
Power source: 2 AA/LR6 alkaline batteries Ni-MH batteries
Wireless flash shooting Approx. Time: 1 0 continuous hours
Dimensions: Approx. 67.7 (W) x 66.7 (H) x81.3 (D) mm
Weight: Approx. 110 g (transmitter only, excluding batteries)