Radio popper - for wireless connection to flash units. Great for 'strobist' style photography lighting on location.
Also comes with 2 flashzebra cords for hotshoe adaptors. Used with a Canon flash setup when I used it.
http://www.bhphotovideo.com/c/product/917621-REG/radiopopper_jrx_ks_transmitter_receiver_kit.html
Manufacturer's listed range is spotty, in my opinion.
flashzebra cords are like this, but I used them with Canon:
http://www.flashzebra.com/products/0220/index.shtml