Compatible with Pentax Wireless Flash System. A YN585EX supports receiving wireless signal from the master unit of AF-360FGZ, AF540FGZ II and other Pentax cameras. It also supports 4 channels, off-camera TTL and manual flash. Completely Support TTL Function YN585EX supports FEC, FEB, Rear-curtain Sync and Red Eye Reduction. TTL flash with High Guide Number GN58@ ISO100,105mm; supports TTL, M and MULTI mode. Multiple Trigger Synchronous Mode Supported YN585EX can be triggered through the camera, wireless triggered by the built-in flash or master flash, or triggered in S1/S2 pre-flash avoidance mode. Firmware Upgrade YN585EX is equipped with USB port. It's convenient to visit the official website of YONGNUO, download the latest firmware and upgrade the speedlite. Equipped With Electric Zooming Supports auto and manual zooming, the flash can coverage can be changed between 20~ 105mm. Ultra-fast Charging Recycle System The Charging recycle time is 3s when the speedlite is used with maximum output power. The charging recycle time is about 4~5s even the speedlite is not used with brand new batteries. Real-time Displaying the Electric Quantity It's convenient for you to know how the battery status for YN585EX supports real-time displaying the electric quantity. AF Assist Beam Equipped YN585EX is equipped with AF Assist Beam. Quick focus is easily to be realized in dark environment. Sound Prompting System When the sound prompting system is enabled, the different sound ways will prompt different operating state of the flash so as to allow you focus on shooting. Equipped with Big Size LCD Display Screen, Standard PC synchronous Interface Advanced Options Settings and Auto Save settings Suit for Pentax K3II Ks2 K5 K50, K100 K100D K200D K-7 Kx Kr K-5 K-01 K-30 K-5II K-5IIS K-500 K-3 K110D Km K-S1 K-S2 K-1 K-70 Suit for Pentax K3II Ks2 K5 K50, K100 K100D K200D K-7 Kx Kr K-5 K-01 K-30 K-5II K- 5IIS K-500 K-3 K110D Km K-S1 K-S2 K-1 K-70 Package Including: 1 x YN585EX for Pentax 1 x Mini Stand 1 x User Manual 1 x Original Box