Spy GSM Earpiece Set

This highly covert earpiece set works on different gsm900mhz and gsm1800mhz mobile phone networks. This device automatically transfer audio signals to earpiece and takes calls once it is switched on after inserting sim card. Its earpiece contains a built-in 35db microphone that ensures partners at both end can even hear whisper sounds. This device is so covert that one will understand that you are engaged in some sort of secret conversation.