Mcoplus&reg; Meike RC9-N3 16 Channels Wireless Remote Receiver & Transmitter Shutter Realease/Flash Trigger for Nikon D7100 D7000 D5200 D5100 D5000 D3200 D3100 D90 -Can be used as receiver and transmitter. -Cable shutter, wireless shutter, wirelessly trigger the flash -Transmission frequency: FSK2.4G -Wireless distance:100m(in open air) -Power supply: 4*AAA batteries