E-Bolus is an intelligent tool devoured by animal. This tool is applicable only for livestock with rumen (cattle, sheep, camels…). Bolus has more capabilities in compared to the other elements introduced here. It is equipped with GPS/ temperature/ PH/ accelerometer sensors to show estrus, activity level, food and water intake and health condition. It can be equipped with a SIM card or Lora wan for communication means. As it is in vivo, it is the only element capable of measuring internal parameters.