SMDV Wireless Shutter Release Remote RFN-4s for Nikon D4/D3/D810/D800/D700/D300S Wireless Shutter Release Remote RFN-4s from SMDV This is for use with Nikon Camera only such as Nikon D4/D3/D810/D800/D700/D300S The package consists of transmitter, receiver channel pin strap and more with user guide Support auto focus, release and bulb shooting wirelessly, up to 120 meter operating range Manufactured in South Korea