Product Description:application:- Rental / management of motor vehicle.- Positioning and guardianship of children / elderly / disabled / pet , send SOS signal.- Safety of personnel / tracking important stuff / help search in the outer.- HR management / tracking of key persons / field service management.- Hidden tracking and tracing of perpetrators.- Corresponding headset is included , so you can make calls with the device.Color:Black.Material:plastic shell + Electronic Components.function:- Real-time positioning.- Location via SMS or the location service.parameters:- GMS Frequency:900/1800 MHz or the 850/1900 MHz.- Working voltage:DC 12V.- GPRS:Class 12 , TCP / IP.operation:a) Install the SIM card is properly.b ) setting the SOS emergency call:Send SMS # 711 # emergency numbers # device device password # code # Your phone numbers # 0 to the above SIM card number.c ) SMS Positioning:6660000 Send SMS to the above card number.d) locating Serves:Enter www.gps588.com , select IMEI user account and password type in ( The account number is the last 8 digits of IEMI , the password is 123456).Note:Because the operators are different in different countries , you need to activate the device in front of the other operation.Please texting "AA , XX, YY " ( named after the local operator , user name, password ) to the SIM card.After username and password , you can check with the local operator.Package includes:1 x tracking device.1 x Power Adapter ( EU standard ).1 x headphones.1 x USB cable.2 x User manual