这个微型发射器可以实时传输病人的心率数据。

The ___micro-transmitter can send the patient's heart rate data in real time.

警方在嫌疑人的车里发现了一个微型发射器，用于跟踪他的行踪。

The police found a ___micro-transmitter hidden in the suspect's car to track his movements.