RFN-4s Wireless Remote Shutter Release for Nikon DSLR with MC30 Type connection (Nikon D200, D300, D300s, D500, D700, D800, D800E, D810, D1, D2, D3, D3x, D3s, D4, D5) - Transmitter and Receiver Set Compact Wireless Remote Control Shutter Release for Professional Nikon Cameras 16 channels in 2.4GHz frequency. Maximum range of 320 ft (100 meters). Bulb mode function. Transmitter conveniently uses AAA battery (battery not included). Upgraded (from Oct. 1, 2017) receiver unit features more robust pins and more flexible antenna.