Review of Cowboystudio 4-Channel Radio Remote Trigger

Recently, I just got this very cheap remote trigger for DSLR to wirelessly control studio lighting system. The brand name is Cowboystudio. It's a four channel radio remote trigger.
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First,
You should check your DSLR camera and make sure it has the flash light sync cord port. Please see the image below.

Second,

Place the transmitter on the DSLR's hot shot and plug the sync cord into the camera's port.

Third,

Find the 3.5mm or 6.35mm sync port on your flash light or Monolight. Use the sync cable to connect the receivers with your lights.

In my test, I have totally four receivers with one transmitter. Make sure to turn on the transmitter and check the battery level. As you can see here, we have four points lights which are two front lights and two background lights.

Depend on my test, this trigger is functioning very well within 25 feet away from the front lights position. After I took the photos of the item on the table, I found that it only supported up to 1/160 shutter speed perfectly.

1/160 ISO 100 F14                              1/200 ISO 100 F14

                       

1/250 ISO 100 F14                                1/320 ISO 100 F14