The TR-A3 Digital Trigger Set from Jinbei is a 2.4 GHz wireless transmitter and receiver set for AC powered studio strobe units.
It features a flash sync speed of up to 1/250 second, four user-selectable channels, and a range of up to 328 feet.The transmitter fits any standard camera hot shoe and has a power button,
which also doubles as a test button for triggering the connected strobe units manually.
The receiver incorporates a short, integrated AC cord and is powered by connecting it inline with the AC cord used for the studio strobe light.
Then simply plug the receiver’s attached 3.5mm miniphono sync cord into the strobe unit’s sync socket and begin shooting with wireless freedom.