The kaiser hot shoe adapter with 3.5mm jack is an easy and convenient way to enable the use of wireless triggering devices such as the pocket wizard and elinchrom skyport transmitters and receivers with flashguns without a standard pc socket. The 3.5mm jack is the correct fitting for most of these receivers and once mounted into the hotshoe your flashgun will be triggered when a signal is received from the transmitter. The unit has a 1 4 inch tripod thread on the base. Please note that the kaiser hot shoe adapter with 3.5mm jack is not compatible with minolta or sony flashguns due to their unique hotshoe mounting.