Feature: This product is used the Taiwan s newest technology, which has the advantages of small and exquisite volume, clear voice, long standby duration, simple operation, stable performance, easy installation and so on. It is mainly used for home monitoring; children, old people, pet supervision monitoring; car, warehouse security tracking etc. Specification: Connection: GSM/GPRS GSM Frequency: 850/900/1800/1900Mhz Charger Standard : 5.0V500mA 25mA Charge input: Input AC 110-220V 50/60Hz Charge output: Output DC5.0V 500mA Battery: Chargeable 3.7V 500mAh Li-ion battery Humidity: 5%-95% non-condensing Storage temperature: -40 to +85 Working temperature: -20 to +55 Color: Black Dimension: L44mm x W32mm x H13mm How does it work: Your surveillance operation will be underway in 4 simple steps: 1. Insert a mobile phone SIM card in the device (E.G. free PAYG SIM card from O2 etc) 2. Conceal the device where it cant be seen... 3. Dial the pay as you go number from your phone..... 4. Listen - now you can hear what they are really talking about... Notice: 1.before using the new machine should be filled with electricity, in order to achieve the best effect. 2.the charger papameters: 5.0V, 500 MA, in order to avoid damage the host. 3.When installing, please pay attention to GSM network signal strength, do not install in no signal or weak signal of place, so as not to affect the use effect. 4.When ran out of battery ,the indicator light is not bright, So please charging before use. 5.When you couldn't get through the phone ,please re-inserting the card and booting or charging again then re-test. 6.When could not be automatic answer, please re-inserting the card and booting. 7.When could not reply the message, please check whether the sim card have to owe a fee, or check whether the sim card is filled with text messages, then try it again. 8.If you need other security function ,please contact the seller directly to customize. 9.this product is forbidden for illegal purposes, Otherwise your peril. Package includes: 1 x Mini Global Tracker 1 x USB Cable 1 x User Manual