2.4G Wireless Radio System Master Slave Speedlight Flashlight Speedlite

Two transmission ways, optic transmission and 2.4G wireless transmission, better to meet your needs.

Features:
Powerful flash with guide number 60m at ISO 100. 
Supports multiple flash modes M/RPT/Multi. 
Support high speed sync, 1st curtain snyc and 2nd curtain sync, the maximum shutter sync is up to 1/8000s. 
Support optic transmission, as a master unit, it can control other speedlights, such as for Nikon SB-900 and SB-910 via optical pulse signal; as a slave unit, it can receive signals from for SB-900 and SB-910 and internal flashing from D7100/D7000/D800 ect. 
Support 2.4G RT system, built in 2.4G radio transmitter and receiver, can be used as on-camera master unit and slave unit of 2.4G RT system, compatible with speedlite TT685N, Godox X1N, X1T-N and X1R-N flash triggers. 
The 2.4G wireless triggering distance can reach up to 100m, better to meet your needs. 
Support FEC/ FEB functions. 
Multiple flash groups, it supports A/B/C groups. 
Supports auto and manual zoom, the flash coverage can be changed between 20-200mm. 
Sync port and USB port.   

Specifications:

Type:
Compatible Cameras:for Nikon DSLR Cameras(i-TTL auotflash); 
Guide Number:GN 60m(ISO 100); 
Zoom Range:20-200mm auto and manual zoom(14mm with wide panel); 
Adjustable Flash Head:0~360°horizontally and -7°~90° vertically; 
Flash Duration:1/300 to 1/20000 seconds; 
Exposure Control:; 
Exposure Control System:i-TTL autoflash and manual flash; 
FEC(Flash Exposure Compensation):; 
Support Manual.FEB:(1/3rd increments±3stops); 
(Manual FEC and FEB can be combined); 
Multi Flash:Provided(up to 100 times, 199Hz); 
Sync Mode:High speed sync / 1st curtain sync / 2nd curtain sync; 
HSS:up to 1/8000s; 
Flash Mode:i-TTL /M /RPT; 
Wireless Flash(optic and 2.4G); 
Wireless Flash Function:Master, Slave, Off; 
Controllable Slave Groups:3(A/B/C); 
Transmission distance(approx.):Optic:; 
Indoors:12 to 15m; 
Outdoors:8 to 10m; 
2.4G:100m; 
Channels:Optic:4(1,2,3 and 4); 
2.4G:4(1-32); 
Slave-ready indicator:Two red indicators blink; 

Auto Focus Assist Beam; 
Effective Range(approx.):Center:0.6m-10m; 
Periphery:0.6m-5m; 
Power Supply:4 * AA Alkaline or NIMH battery(Not included); 
Recycle Time:Approx 0.1-2.6s; 
Sync Triggering Mode:Hotshoe,3.5mm sync line, wireless control port; 
Color Temperature:5600±200K; 
Dimension:; 
Item Weight:412g / 14.6oz; 
Item Size:19 * 7.5 * 5.0cm / 7.5 * 3.0 * 2.0in; 
Package Weight:530g / 18.oz; 
Package Size:20 * 9 * 8cm / 7.9 * 3.5 * 3.1in;

Package List:
1 * Speedlite; 
1 * Carrying Bag; 
1 * User's Manual