Neewer 2.4G Wireless 1/8000 HSS TTL Master/Slave Flash Speedlite for Nikon DSLR Camera with 2000mAh Li-ion Battery to Provide 650 flashes Recycle in 1.5s NW860IIN with big and clear LCD display screen,Powerful Flash with High Guide No.60(m ISO 100); High-speed sync up to 1/8000th of a second Flash Mode:i-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 N1N to use i-TTL function, and for FT-16S flash trigger to remotely control and trigger the flash(Note:you need to buy N1N and FT-16S additionally) 2000mAh Chargeable Li-ion Battery to Provide 650 Full Power flashes Recycle less than 1.5s