YONGNUO i-TTL Speedlite YN685 (YN-568EX Upgraded Version) 622N/603 Dual Wireless System Works with YN622N and RF603 Wireless Flash for Nikon DSLR + EACHSHOT Color Filters + EACHSHOT Diffuser GN60@ISO100,200mm,The YN685 is 2.4GHz wireless high guide number speedlite, supports TTLMMulti mode. Supports Auto and Manual Zooming,Supports auto and manual zooming, the flash coverage can be changed between 20~200mm. Specific Sound Prompt System,When the sound prompt system is enabled, the speedlite can prompt its working condition, allows you to focus on creative process. Note: the sound prompt can be turned on/off. Supports Custom Settings (Fn.) and Auto Save Settings Equipped with LCD display screen and standard PC sync interface