It's a Beeper for Hunting dog's.The hunter put it,on the dog's neck,like a collar.Then, when the dog is moving fast,the beeper makes a slow motion "BIB".And when the dog is moving slow or no move,which means that have find the "Bird", the "BIB" becomes very quick.

Pet collar,Hunting Dog ,game caller,Dog training,with CE/FCC/ROHS.