Translation of "hidden earpiece" into Basque

Returning from a concert, at the Durango toll plaza, Civil Guards make you get out of the car. They take you up into the mountains. The officer forcing your head down wears an earpiece, through which questions are dictated to him.

Kontzertu batetik bueltan, Durangoko peajean, guardia zibilek autotik aterarazten zaituzte. Mendian gora zaramatzate. Burua makurrarazten dizun poliziak pinganillo bat du, eta handik diktatzen dizkiote galderak.