MOOCALL CALVING 3G SENSOR is a tail mounted calving sensor that enables
a calving cow to send you a SMS text alert approximately 1 hour before
she calves. MOOCALL will detect & record her activity to accurately
determine when she will most likely calf. Then they send an SMS alert to
up to 2 phones to ensure that you can be present when calving occurs.
New style 3G.