Yongnuo RF-603 Single 2.4GHz Wireless Flash Trigger/Wireless Shutter Release Tranceiver for Nikon Cameras Includes (1) Transceiver only for Nikon Transceiver System - works as a wireless flash trigger or receiver Each RF-603 is designed to work as trigger or as a receiver Compatible with Nikon D1/D2/D3/D200/D300/D700/D90/D3100/D5000/D7000 cameras