The MTX9 advanced N9 mini GSM spy audio bug listening device with quad band four frequency support for UK and EU networks. It works with most major networks around the world and does not require credit to use. The MTX9 is completely free to operate as listening device.
The MTX9 is widely used for audio surveillance monitoring of sounds/voices at home or work. It has good sound quality with minimum echo or feedback with 2 sensitive microphones and works well picking up conversation over 5 metre radius.
The battery lasts 1-3 days depending on network signal strength and its usage. In full use the battery last 2-3 hours. This N9 will save power by disconnecting the call after 4-5 minutes and will reset, ready to call again. For the Micronic N9 Plus which has a better battery (10 days+), please click here.
It's small size of only 43mm x 22mm x 10mm and weight of only 19 grammes is easy to conceal. You can also connect this to 5v USB p[hone charger to operate indefinitely.