Here’s a typical lactation curve, admittedly still in first 305 days.
But this is sort of cow I aim to breed.
Remember a cow doing even 30l/day gains 1800l by milking through “dry period” so that’s 6l/day gained for whole of a 305 day lactation.
That’s point to point. Transmits over long range but only to each other.
Limiting factor will be your devices rather than the transmitter.
My phone connects through buildings etc up to 150 metres. Clear line of sight would be a lot further.
Cameras and equipment with own aerials should be...
Stick an outdoor Wi-fi access point up high on house or in attic. If house at edge of yard use directional transmitter. If it’s in middle then an omni-directional one. Had mine 5 years no problems. Connects via Ethernet cable and needs low voltage power supply
Cheaper than most indoor systems.