Viltrox JY-610N i-TTL On-camera Mini Flash Speedlite for Nikon D3300 D5300 D7... JY610N is a mini speedlight flash unit which is light weight on any camera. Flash head adjustable 0-90 degrees, more easy and convenient to use. Its guide number is GN 27 (in focal length 50mm at ISO 100 in meters). Exposure control system: Manual flash, i-TTL flash. Suitable for Nikon cameras.