Question about Kaiser Fototechnik Multi Trig AS 5.1

hallo. Can u help me with this product? two Kaiser devices must be paired - trigger and receiver Now i have a receiver, so I need a trigger on this page it is written that this is a trigger, but on the body of the device itself there is a symbol R which means a receiver I need a device with a T symbol Write pls if I am exactly dealing in this page with a trigger