1、The rotatable LCD screen is clear for displaying multiple indices, the buttons and knob can help you to adjust various settings quickly and easily 2、Multiple functions, exposure compensation, i-TTL flash, master unit, AF assist, etc. Versatile for providing professional lighting to you 3、Power zoom function automatically adjusts the zoom position to match the lens focal length, practical and convenient for you to use 4、Supports quick switch of FX and DX frame, making itself applicable to more cameras 5、Lightweight and portable, powered by 4 AA batteries, useful tool for photographer lovers Features: The rotatable LCD screen is clear for displaying multiple indices, the buttons and knob can help you to adjust various settings quickly and easily. Multiple functions, exposure compensation, i-TTL flash, master unit, AF assist, etc. Versatile for providing professional lighting to you. Power zoom function automatically adjusts the zoom position to match the lens focal length, practical and convenient for you to use. Supports quick switch of FX and DX frame, making itself applicable to more cameras. Lightweight and portable, powered by 4 AA batteries, useful tool for photographer lovers. Specification: Material: Plastic Color: Black Screen Type: LCD Guide Number: GN60 (ISO100, 200mm) High-speed sync: 1/8000s Flash mode: i-TTL/M/RPT Auto and manual zoom: 20-200mm (When using wide angle dispersion plate is 14 mm ) Slave modes: Optical pulse slave function fits for Nikon (Manual mode), light trigger S1, S2 Shutter sync: High-speed sync, first-curtain sync, rear sync Flash exposure compensation: Yes, 1/3 gear incremental Flash exposure bracketing: Yes Flash exposure lock: Yes Modeling Flash: Yes AF Assist: Yes Manual Flash: 8 levels of output control (1/128-1/1), 1/3 stop incremental Frequency flash: 1-199Hz Recycle time: Quick flash less than 2s, ordinary flash less than 3s Optical pulse transmission distance: About 20m Optical pulse transmission channel: CH.1- CH.4 Flash grouping: Support A/B/C flash group External Interface: Hot-shoe, PC sync interface, external charging interface Power supply: 4 x AA batteries (not included) Other functions: Custom function, overheating protection function, power saving mode function Size: Approx. 80 x 143 x 125mm / 3.15 x 5.63 x 4.92inch Weight: Approx. 656g Suitable for Nikon D810, D800, D800E, D700, D750, D610, D600, D300s, D300, D200, D7100, D7000, D90, D80, D5300, D5200, D5100, D5000, D3000, D3100, D3200, D3300 Package List: 1 x Speedlite 1 x Base 1 x Storage Bag 1 x Manual