A SIM card is inserted into the disguised GSM listening bug inside the USB flash. The device itself has to be plugged into the USB port of a computer or external charger (Powerbank) or charger USB socket and operates on a constant power supply. The microphone has high sensitivity, so you can hear sounds by spy call in large rooms. The listening bug works with all SIM cards.

Technical specifications:

• Mobile GSM network;
• GSM frequency: 900/1800 MHz;
• Listening bug operated with all telecommunications operators;
• Range of microphone operation: 5–7 m;
• Unlimited audio surveillance duration of operation;
• Operated by constant energy supply;
• User manual in English.

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