I just picked up pare of these, not only will they trigger your camera up to 300 ft, they have a hot shoe for flash, as well the ability to attach to the camera hot shoe, plus a plug for what I think is call a PC- cord, also, a jack for a cord that plugs into the camera.
These are transceivers, and they are all identical, each unit can send and receive and work with all other units, they have 16 different channels.
There very well made. Check it out, its a great value at $35.00/pare.
Yongnuo RF-603 N3 2.4GHz Wireless Flash Trigger/Wireless Shutter Release Transceiver Kit for Nikon D90/D3100/D5000/D7000