Mktcam is delivering consumer electronics direct from China to all worldwide destinations.We are focus in spy home security camera and telecommunications.Such as mktcam, spycam, hidden camera, security camera, wireless camera, spy video camera, mini spy camera, spy camera glasses, smallest spy camera, nanny cam, wireless dvr, mobile phone,GSM phone. Spy GSM listening Device MKT-VGSM01 It's a tiny box, measuring just 60x25x15(mm), with a built in microphone. The device couldn't be simpler to use, all you have to do is insert a GSM SIM card (available from us with a Vodafone card, option below) and call the number. Your call will silently connect and you can then listen in to any surrounding sounds that the mic can pick up. The product has a built in battery that is rechargeable via any mains power socket (charger supplied). Specification: 1.Frequency : 800MHz, 900MHz, 1800MHz.Pls double check if avaible used in your country GSM service. Not for 3G Network,CDMA etc. 2.Size: 60x25x15(mm) 3.Microphone range(Meter): 5~7(Radius), 4 levels 4.Standy by time is :2~-3days 5.Working time: Depen upon usage Package Includes : GSM Bug, USB lead and charger .