Breeding is one of the priorities of the dairy and beef cattle breeding industry. Cattle carry a pregnancy for 280 days and usually give birth to 1 calf per year. For beef farms, each additional calf means an additional cow's income in the same amount of time. For dairy farms, the peak milk production of cows is 1 to 6 months after calving, after 6 months milk production and milk quality have dropped significantly, the economic benefits turn negative, should be as soon as possible to let the cow calve again. Therefore, it is important to improve cow reproduction rate and shorten the calving interval to improve the economic benefits of beef and dairy cattle production.

Improving the rate of estrus unveiling is a prerequisite for good reproduction. The cow's estrus cycle is 21 days, each time the duration of estrus for 4 ~ 12 hours, miss this time can only wait for the next estrus to breed. By automatically detecting the cattle's activities, the collar can timely find out whether the cattle are in heat or not, whether there is any disease or not, and improve the rate of heat detection, improve the rate of disease detection, and reduce labor costs.

WS8509 series products are developed by Chengdu Silent Smart Technology for data monitoring in agriculture and animal husbandry. The products include wireless ear tag, wireless collar and relay gateway. The program collects ear tag or coil data regularly through the relay gateway and uploads it to the cloud platform, which can monitor the cow's estrus condition, scientifically and effectively improve the breeding rate and milk production, thus enhancing the economic benefits of farmers.

Silent Smart innovatively uses STMicroelectronics-based LoRa SOC chip STM32WLE5 to design extremely low-power wireless ear tags and collars, which are more resistant to interference and have a longer communication distance than traditional Bluetooth ear tags.The STM32WLE5 series has a wealth of peripherals and features conducive to communication, as well as a variety of low-power modes that can maximize the life of the battery, so that the ear tags can be used for up to 6 years. The earbuds can be used for up to 6 years.

The ear tag and collar are integrated with a high-performance, ultra-low-power, three-axis "femtosecond" accelerometer, which is periodically woken up to upload data over a wireless network, providing industry-leading security, low power consumption, and fast wake-up times. Optionally, GPS positioning can be added to realize the intelligent asset management function.