Received this today. It is very smooth and operates without catching or sticking. It is listed as 4x4x4 but is really 2.5 inches. It's not a deal breaker but I was expecting a larger cube.
16CH Wireless Remote FM Radio Flash Speedlite Trigger w/2.5mm 4 Receivers EM#01
07 sept. 2016
Great product regardless of price
In the manual it state the distance is 30 meters (98 feet). I measured (with fresh coppertop batteries) up to 75 feet maximum working distance from remote to flash unit. Still pretty great (for me). The trigger build construction is a Hard plastic and metal hot shoe attachment. The dip switches are sturdy/tight. Overall great quality. I would prefer a metal cold shoe mount for the camera but the plastic one is not too bad. I just like metal. The remote unit is made of the same hard plastic with plastic cold shoe camera mount.