Product Features:
Working based on existing GSM/GPRS network and GPS satellites, this product can locate and monitor any remote targets by SMS or internet.
Geo-fence: The unit will send the message to the authorized numbers when it breaches the district.
Movement alert: When the unit stays immobile in a place for 3-10 minutes, then the unit will reply, it will send SMS "Move" along with a Geo-info to the authorized numbers. It will alarm one time in each setting.
Over speed alert:  When the target moves exceeding the speed you setting, the unit will send SMS +Geo-info to the authorized numbers.
Audio monitoring: You can dial into the GPS unit and simply listen to the sounds around the unit.
SOS function:  When holding the GPS Tracker you can press alarm button to send alert, and your position to the registered phone numbers.
New features:
TK102-2 uses ARM7 processor, compared to TK102-OLD (TK102), it has the following outstanding advantages:
Indicate the charging status (the unit is being charged or not)
Report the battery strength, number of satellite, altitude etc.
For auto tracking no need to send the new coordinates if the moving distance is less than 50 meters (to save the cost and the power).
Cell ID positioning
Send all commands via hyper terminal or via GPRS
The minimum positioning interval is 5s instead of 30s.
Support Google map positioning on smart phone
Add a SD Card Slot:  SD card can store the coordinates when the GPRS is disconnected.
Specifications:
Dim:  64mm x 46mm x 17mm (1.8”*2.5”*0.65”)
Weight:  50g
Network:  GSM/GPRS
Band:  850/1800/1900Mhz or 900/1800/1900Mhz or 850/900/1800/1900
GPS chip:  SIRF3 chip
GSM/GPRS module:  Siemens MC55 or Siemens MC56 or Simcom300 or  
Simcom340
GPS sensitivity:  -159dBm
GPS accuracy:  5m
Time To First Fix
Cold status:  45s
Warm status:  35s
Hot status:  1s
Car charger: 12―24V input, 5V output
Wall charger: 110－220V  input, 5V output
Battery: changeable 3.7V 800mAh Li-ion battery
Standby: 48hours
Storage Temp:  -40°C to +85°C
Operation Temp: -20°C to +55°C
Humidity: 5%--95% non-condensing
Package Content:
Mini Real time GPS Tracker x 1
Rechargeable Li-ion Battery x 2
Battery Charger x 1
Power Adapter x1
CD for GPS tracking application x 1
Water-proof Bag x 1

Note:
Battery and Charger
Do charge the battery to capacity in 8 -12 hours for first use.
Please use the battery and charger provided by the manufacturer. This unit adopts built-in Li-ion battery, and full battery will support around 48 hours use on end. After first use, the battery can be charged fully in 3-5 hours.