Neewer TTL Flash for Sony New Mi Hot Shoe Camera GN60 HSS 2.4G Wireless 1/8000 Master Slave Speedlite for Sony A77II A7RII A7R A58 A99 A6000 Powerful Flash with High Guide No.60(m ISO 100); High-speed sync up to 1/8000th of a second Flash Mode:TTL,M,Multi,FEC,Master,Slave,S1,S2 Supports Optic transmission and 2.4G transmission.2.4G Communication distance up to 100 meters Built-in 2.4G ultra-long-distance wireless remote system for transmission and for using dedicated remote control N1S to use TTL function, and for FT-16S flash trigger to remotely control and trigger the flash(Note:you need to buy N1S and FT-16S additionally). Additional function: Front curtain sync and Rear curtain sync,Flash exposure compensation,AF Assist Beam,Custom function setting, Over temperature protection