Ok, had a short chance to test some range on the Cactus V4's. Set up was 2 flashes at same location. I started at 150' and all was well. 20 for 20 (actuations, 40 flashes 2x20). I then tried same distance with the small antenna down and they would not go off. I then moved the camera to 200' and again 20 for 20. I then moved to 250' and started to get some misses. One flash was consistant 20/20 other was about 10 for 20. Was always the same flash (left one as I was looking at it). What is odd is when I turned the camera 90 degrees to the left. The left flash was perfect and the right flash did not fire. Turned back to straight on shots and again left flash intermittent and right flash perfect. I then moved to 300' and left flash started to fire and right flash was intermittent. As I was moving farther away I was getting lower than the flashes. But only about a drop of 6' in elevation. Flashes would fire from 300' but not consistant. 300' was as far as I could go (would have to cross busy road). Measurements made with a 300' fiberglass reel tape measure. I then moved back to 225' and to an area with nothing but lawn between the flashes and camera. Both flashes were again 20 for 20. Flashes and recievers had fresh batteries (alk in the recievers, and rechargeables in the flashes). Also noticed that anything near the transmitter like a hand makes a difference (shortened the range). I noticed this as I was hitting the test button while moving around and was not getting the same range as I was using the camera shutter button. I was going to grab my SC cord and move the transmitter off camera but the rain started to come. So play time is now over. Range for consistant use appears to be around 200' -225' (line of sight no obstructions). Cactus claims 100'.