This mini eavesdropping device is a great spy audio system, just insert a GSM SIM card into the slot of this spy audio device, and put the audio bug at a hidden place, then you just dial the SIM card number to monitor your target, this audio bug also features voice activated call back, so once it detects voice around it, you will receive its call at once to hear the sound around the audio bug.(0-15m range)
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