JT200 is one standard GPS Children Tracker. it support Quad-band GSM and support SMS and TCP/IP. It can be used Student/Children and so on, it has SOS and two way conversation feature and so on. It is designed never used any GSM modul and GPS module, all the design in one PCBA, it will have better performances and more reliability than other tracker only assemble GSM and GPS model that buy from third party. Feature List: GPS GSM GPRS wireless network GSM 900/1800 Dual-band Colorful design GPS LBS A-GPS fast positioning High sensitive GPS chip and antenna Voice monitoring function Intelligent GPS sleep mode for saving power. Auto power on when the battery is installed Anti-disassembly design Special numbers for SOS emergency fast-dial Limit shutdown Geo-fence Specification: Monitoring Scope :- ≤ 5 M Colored Monitor :- Resolution 128*128 Pixels Keypad Indicator :- 4 family keys, 2 function keys, 1 SOS key, 1 battery keys. GSM/GPS Antenna :- Built-in Battery :- 600mAh / 3.7V lithium-polymer battery Voltage/Current :- 3.7 VDC / 80mA Standby Time :- 120 hours (LBS 10 minutes to report) Call Time :- 4 hours Charging Voltage :- 5 VDC Color :- Pink (HAPPY BEAR), Blue (MUSIC BEAR), (DOUBLE BEAR) Dimensions :- 65.0(L)*44.5(W)*18.0(H) mm Weight :- 52g Operating Temperature :- -20°C to 60°C GSM Specification: Communication System :- GSM GSM Spectrum :- 9001800 MHz GPRS :- Class 12, TCP/IP 64 MB Phrase Error :- RMSPE <5, PPE<20 Max Output :- GSM 850/ GSM 900 : 33 ± 3 db, GSM 1800/ GSM 1900 : 30 ± 3 db Max Frequency Error :- ±0.1 ppm Sensitivity :- Class II RBER 2% (-10 dBm) GPS Chip – u Blox high Sensitivity chip Frequency: L1, 1575.42 MHz C/A Code Channels :- 56 Location Accuracy :- <10 meters Tracking Sensitivity :- -162 dBm Acquisition Sensitivity :- -148 dBm Positioning Time :- Hot-Start : ≤2 sec (open sky), Cold-Start: ≤35 sec (open sky). Additional Information: Item Code: JT-200CT