The US garbage keepers who want to know if their cows are waiting will have to stick a special patch on the cows' tail. This patch has a piezoelectric sensor and a 400 m range radio station. The baserritarras know if the cow is susara or not because they want to cover it.
When a cow has special attention, it detects piezo sensors and emits a radio signal. Cows only stay at Susan between 10 and 12 hours a month. The patch will be of great help to the baserritarras, as it will tell them when they should artificially fertilize the cow.