YongNuo External Flash Battery Pack SF-18 for Nikon Flash Holding 8 AA Batteries
Protective Case 1/4'' Thread Screw Efficent Performance Maximum of 15 consecutive
1.Specification: it is an external power source for the Nikon Speedlight. oduct dimensions: 69mm(w)x158mm(h)x25mm(d) . Net weight: 170g. Operating Temperature range: 0oC-40oC. Suits: Nikon flashes. Package Includes: 1 x External Flash Battery Pack (batteries not included), 1 x padded protective case, 1 x 1/4 inch screw adapter & English and Chinese instructions. Note: a, Depending on state of battery charge; b, Maximum of 15 consecutive shots without break or risk of overheating..