Features:<br /><br />1.     Compact size・ easy to carry.<br /><br />2.     Fast signal acquisition.<br /><br />3.     Low power consumption・ long stand-by life<br /><br />4.     Simple operation and convenient installation.<br /><br />5.     Widely used for household monitoring・ children・ pets・ cars・ etc.<br /><br /> <br /><br />Specification:<br /><br />Connection: GSM/GPRS<br /><br />Material: Plasticcement<br /><br />GSM Frequency: 850/900/1800/1900Mhz<br /><br />Charger Standard : 5.0V500mA 25mA<br /><br />Charge input: Input AC 110-220V 50/60Hz<br /><br />Charge output:Output DC5.0V 500mA<br /><br />Battery: Chargeable 3.7V 500mAh Li-ion battery<br /><br />Humidity: 5%-95% non-condensing<br /><br />Storage temperature: -40 to +80 <br /><br />Working temperature: -20 to +55 <br /><br />Color: Black<br /><br />Weight: 30g<br /><br />Dimension:43.2*32*13.6mm/1.2*0.9*0.4 inch (L*W*H)<br /><br /> <br /><br />How does itwork?<br /><br />Your surveillance operation will be underway in 4 simple steps:<br /><br />1. Insert a mobile phone SIM card in the device (E.G. free PAYG SIM card from O2 etc)<br /><br />2. Conceal the device where it can tbe seen...<br /><br />3. Dial the pay as you go number from your phone.....<br /><br />4. Listen - now you can hear what they are really talking about...<br /><br /> <br /><br /> Notice:<br /><br />1. Before using the new machine should be filled with electricity・ in order to achie