Are you still on the road safe for the children to school in fear it? You also fun for the children from school out an alarm? Now, all the worry and fear are no longer needed! An Xuesheng deep green cards anytime, anywhere, safe and secure! 1, the electronic sign. (Real-time information from school electronic sign sent to parents bound phone) 2, GPS positioning security check. (Parents can always check the students' specific location information) 3, SOS emergency relief. (When students encounter an emergency situation, simply press the SOS button for three seconds, the real-time location information is sent to the parents of the phone and dialed the parents phone) 4, family dialogue PTT. (Can be set to four family number, a key link between parents and children feeling) 5, affection ears. (Parents can call the number to listen child information) 6, home-school exchange. (School students release specific information in real-time activities of school events are sent to parents phone) An Xuesheng deep green card, a key Unicom, a key peace of mind! 1. Single SIM card; 32Mbit ROM space, 32Mbit RAM space; 2. Dual Band GSM900 + 1800 (quad-band), in line with the requirements of the operator; 3. High-speed hardware UART interface with FIFO; built-in TCP / IP / UDP protocol stack transparent transmission of data, user-friendly; support a separate closed and open GPS / AGPS function; 4. Open GSM / GPS antenna shock, saving customers time secondary debugging RF sensitivity of -108dBm; working voltage 3.3-4.1V; 5. volume Small, low-power, low standby current of 1.6mA