VILTROX JY-610N Flash Speed-light Speedlite Portable and Compact Support Nikon CLS function for Nikon CLS camera (JY-610N, Black) 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. Recycling time: Approx. 0.1 - 4 seconds Its guide number is GN 27 (in focal length 50mm at ISO 100 in meters). Suitable for Nikon cameras.