Bower SFD728N Automatic TTL Flash for Nikon D3000, D3100, D3200, D3300, D3400, D5000, D5100, D5200, D5300, D7000, D7100, D7200, D40, D50, D60, D70, D80, D90, D600, D610, D800, D800E, D810, D810A, D4, D4s Auto power saving and check indicator Guide Number: 92 feet (50mm @ ISO 100) Fully Dedicated Digital Flash System 28mm-85mm zoom Coverage