Just put SIM card into the bug slot, it will automatically connect, and then you can listen what you want to.
Technical Specification:
It works with the frequency of 850, 900, 1800, 1900.
Device voice over GSM.
Listen from anywhere in the world.
Built-in li-ion battery for long time and repeatable use.
Brand new product with high quality.
With the mobile phone bug and there will be no secret for the cell phone.
Should be used under legal circumstances.
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