1)The swivel adapter lets you have full control over your flash or slave positioning.

2)Mount your slave to the swivel adapter and then set it on any of your standard mount light stands.

3)The adapter swivels in all directions so you, or your stand, don’t have to get the light where you need it even with difficult angles. 360 degree revolve 
4) Independence power swith
5) Used for photography,has hole for reflecting umbrella