These infinity transmitters Work on the GSM mobile phone  network giving you  worldwide coverage Simply dial the provided SIM card and listen to conversations and surrounding sounds with exceptional quality Unlimited listening distance - call from anywhere in the world. When certain network packages are used it is possible to use these devices at little or no cost, check these with your mobile phone supplier If you need to record the conversations why not take advantage of our superb recording package offer only available when purchased at the same time as one of the infinity devices on this page. click here for details.

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