Data judgment: 1, the pig is not estrus is more than 450. 2, after the estrus, the value begins to decline, the lowest drop to 250- or so, about 20 hours or so at low values, then rise, when the data rises around 350, the first time, the interval is 6-8 hours with the second time (At this time, the data is above 450). 3, the second day after breeding, the data will rise to more than 600, and even reach 800, are normal, it is worth noting that if there is no breeding, there will be no such high data. Technical parameters: Test method: fully automatic one test Test speed: within 3 seconds Net weight: about 300 grams Power: one 9 volt battery, model 6F22 Display: LCD display, about 2.6 inches Measuring range: 10-1990 Working temperature: 0-50 °C Maximum humidity: 85% Basic configuration: one instrument            One copy of the instructions            One certificate            One warranty card