We have first hand experience of using this system and are a re-seller and installer of Smaxtec.
It gives us data on rumination, body temperature, activity, oestrus, drinking & predicts calving. It also analyses groups as well as individuals, e.g. it will assess heat stress in a group.
We run our system from two off-grid solar powered base stations that cover the whole farm.
Drop Graham an email or use the enquiry box.