YONGNUO YN-E3-RT II On-Camera Flash Speedlite Transmitter Flash Trigger Compatible for ST-E3-RT/600EX-RT/YN-E3-RT/YN968EX-RT/YN600EX-RTII/YN686EX-RT/YNE3-RX

Features:
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 ratio transmission.
Flash Modes: ETTL/M/Multi/GR4/ flash modes. supports 1st curtain, 2nd curtain(Only in M mode), high speed sync.
New designed select dial and display interface for easier operation, supports remote control to set the focal length(ZOOM) of the slave flash.
Firmware can be updated via USB(Micro USB), Built-in AF assist beam emitter, transmission range is 100m.
Two-way 2.4G radio communication, fully compatible for ST-E3-RT/600EX-RT/YN-E3-RT/YN968EX-RT/YN600EX-RT(II)/YN686EX-RT/YNE3-RX.

Specifications:
Type: On-Camera Speedlite Transmitter
Exposure Control Syestem: E-TTL II/E-TTL Autoflash, Manual Flash, Stoboscopic Flash, Gr Flash
Frequency: 2405-2475MHZ
Modulation System: Primary Modulation: OQPSK, 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. 100m
Flash Ratio Control: 1:8-1:1-8:1, 1/2-Stop Increments Flash Exposure
FEB: ±3 Stops in 1/3-Increments(When used with flash exposure compensation)
Manual Flash: 1/1-1/128 Power(1/3-stop increments)
Stroboscopic Flash: Provided(1-500Hz)
Flash Exposure Confirmation: Flash Exposure Confirmation Lamp Lights
Model Flash: Fired with Camera' Depth-of-field preview button.
Linked Shooting: Provided
Custom Functions: 9
AF Assist Beam Emitter: Provided
Firmware Update: Provided
Power Source: 2 AA/LR6 Alkaline Batteries Ni-MH Batteries(Not Included)
Wireless Flash Shooting: Approx. Time: 10 Continuous Hours
Power Saving: Power off After 5 min, of idle Operation
Package Size: 11 * 9 * 7.5cm / 4.3 * 3.5 * 3.0in
Package Weight: 240g / 8.5oz

Packing List:
1 * Speedlite Transmitter
2 * Shutter Cable(LS-Micro/C1 & LS-Micro/C3)
1 * Storage Bag
1 * User Manual(English & Chinese)