FREDI HD PLUS Smallest Neckloop Pair it with Any Mobile Phone,Earpiece Nano Bug Device NA Voice Recorder  (0 inch Display)

Mini wireless earpiece is a micro-mini wireless inductive receiver which transforms audio signal through electromagnetic induction. These products make the covert communication possible when it is inconvenient to expose earpieces. earpiece is widely used in many departments .Using this device;You can hear the voice from the person other side,and the person of the other side can also hear your vioce. How to use 1.Open battery door, install the battery perfectly and push battery door into battery box gently. Put the earpiece into ear canal by holding the handle and the slight sound of current indicate working order. 2.Adjust the volume of drive equipment to reach satisfaction. 3.Set mobile phone to automatic return or vibration. 4.Put the inductive loop around your neck and connect the inductive loop to the drive equipments (mobile phone, radio) which are attached to or beneath users clothing.