YONGNUO RF-603II N3 Wireless Flash Trigger For Nikon D90 D3100 D5000 D7000 D5300 D7100 D3300 3pcs The new RF-603 II is improved version of RF-603, it is a remote shutter release as well as a multi-functional radio flash trigger which can synchronously trigger flashes and studio strobes. Through the transceiver based system each item can be used flexibly as trigger or receiver. Only 2 AAA batteries are required as power source for each item. Improved Features: 1. Hot shoe locking system to prevent from slipping off 2. Switch on side for easy operation 3. Enhanced self-detecting system Specification (each item) Specification (each item) Type: FSK 2.4GHz wireless remote system Transmitter Distance: 100m Release: Half-way press, full-way press Transmitter Port: PC Sync Receiver Port: PC Sync, 2.5mm for shutter release Receiver stand-by time: Up to 45 hours (using AAA batteries) Dimensions: 37mm x 30mm x 81.5mm Weight: 150g Compatible Cameras Nikon D90 D5000 D5100 D7000 D3100 D5300 D7100 D610 Compatible Flashes Nearly all flashes with a standard hot shoe and being released by the middle contact are compatible Please note that the RF-603 only supports the manual flash mode, not TTL, but it works with TTL flashes Compatible Cameras Nikon D90 D5000 D5100 D7000 D3100 D5300 D7100 D610 Compatible Flashes Nearly all flashes with a standard hot shoe and being released by the middle contact are compatible Please note that the RF-603 only supports the manual flash mode, not TTL, but it works with TTL flashes Packaged come with: 3 x Transceivers 1 x Shutter release cable (N3) 1 x User manual