Remote listening
Remote listening is done using a micro spy you will move to a particular location to hear everything that is said. It could be a part, or a car. In other cases, the spy microphone is so discreet that it can even slip into the spy person's clothes. Operating with a SIM card, the microphone will use the GSM network to transmit conversations to your phone in real time. The advantage with the GSM network is that as long as the device has good coverage it can transmit conversations, no matter how far away you are from the subject: you can be more than 10,000km away is performing remote listening. To start listening remotely, just call the number assigned to the device and it will drop off on its own. You can hear everything that is said around the device. Another feature can be included in remote lying spy microphones. This is the automatic voice-sensing reminder, a variant of voice activation. With this feature, you don't have to make the call to launch remote listening. It's the device that automatically calls you back as soon as you're detected. So instead of sometimes waiting hours to collect conversations, you'll be notified as soon as there's one around the device. This also saves you battery power.
