Bower Digital Autofocus Power Zoom Flash for Nikon D2X/200/3X/40X/50/60/70/80/90/5000/5100/700/7000, Digital SLR Cameras (SFD680N) Dual power saving mode Guide Number: 139 feet (85mm @ ISO 100) Bounce and swivel zoom head allows versatile reflection for difficult lighting conditions Compatible with all Nikon models including: D2X/Xs, D2Hs, D2X, D200, D3X/3S, D40/40X, D300S, D3000, D3100, D700, D7000, D5000, D5100, D50, D60, D70s, D80, D90 28mm-85mm zoom coverage