So today I got my new dosing pump a Kamoer F4 Pro. I removed it from the box and the quality seemed to be pretty good. I got the app and started setting up (using galaxy S10) setup was simple and connected to my 2.4ghz network no problem. Note this will not work on a 5ghz network. Once connected I tested the 4 heads but unfortunately head 1 was doa and didnt function at all. The other 3 heads functioned properly. The thing that worries me is that when I hit dispense on head 1 the app acted like it was dispensing fluid with no issues. I will be sending this unit back because head #1 doesnt function at all. I did cal the other 3 heads to test accuracy and that was about +/- 2-3%. I have to say with 1 head doa and acting like it is, I will not be getting another because I dont think I can trust this unit. I guess I will get a dos or wait for the echotech doser to come out. To add to this the unit isnt exactly cheap coming in at $379 I expected more from this unit.