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Feature

Two-way 2.4G radio communication, fully compatible with ST-E3-RT / 600EX-RT / YN-E3-RT / YN968EX-RT/YN600EX-RT(II)/YN686EX-RT/YNE3-RX. 15 Physical Channels, 1 Auto Channel, Up to 10,000 customizable photographer ID
Transmission Range: 100M, multi YN-E3-RT II can share slave flashes, display group/charge status of slave flashes
New designed select dial and display interface for easier operation. Supports remote control to set the focal length (ZOOM) of the slave flash (Compatible with YONGNUO compatible flashes only)
Firmware can be upgraded via USB(Micro-USB); High resolution Dot-Matrix LCD, Backlight for LCD/keys; Supports ETTL Ratio, Flash Exposure Compensation, Flash Exposure Lock, Flash Exposure Bracket, Modeling Flash
Built-in AF assist beam emitter, buzzer; Flash Mode: ETTL/M/Multi/GR 4 flash modes; Supports 1st Curtain, 2nd Curtain (Only in M mode), High speed Sync

Description

Speedlite Transmitter YN-E3-RT II
The YONGNUO Speedlite Transmitter YN-E3-RT II 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 flash, stroboscopic flash, Gr flash
Slave unit control: Up to 5 groups (A/B/C/D/E), up to 15 units
Transmission distance: Approx. 100 m
Power source: 2 AA/LR6 alkaline batteries Ni-MH batteries
Wireless flash shooting Approx. time:1 0 continuous hours
Power saving: Power off after 5 min. of idle operation
Dimensions: Approx. 67.7 (W) x 66.7 (H) x81.3 (D) mm
Weight: Approx. 110 g (transmitter only,excluding batteries)