Signstek Mini GPS/GSM/GPRS Personal Tracker Tracking Locator MT90 with SiRF IV, Quad Band, Two-way Audio

About Signstek Brand New Tracker:
Specifications
Charging Voltage: Mini USB charging interface, DC4.2V~5.5V/400mA
Back-up Battery: 950mAh/3.7V rechargeable and replaceable lithium-ion battery (NokiaBL-5C compatible)
Power Consumption: 65mA standby current
Operating Temperature: -20℃~55℃
Humidity: 5%~95%
Work Time: 80 hours in power-saving mode and 10 hours in normal mode
LED: 3 LED lights to show power, GPS, GSM and otherstatus
Button: 5 buttons for making phone call and sending SMS
Microphone/Speaker: Internal microphone and speaker
Memory: 4MB Byte
Sensor: Accelerometer
GSM Frequency: GSM850/900/1800/1900MHz
GPS Chip: Latest GPS SIRF-Star III chipset
GPS Sensitivity: -159dB
Positioning Accuracy: 10 meters, 2D RMS

Please Note:
1,This tracker is a combination of current GSM network and GPS positioning. A suitable simcard is a FIRST NECESSITY to make it work. These 2 CANNOT work seperately
2,Where can I find a sim card: The simcard should be a GSM network based (ONLY GSM). The tracker now CANNOT support 3G in theory
3,If doesn't work,is there any support? Yes, lifetime warranty guaranteed. 30 days free return and money back guarantee. 24 customer service response.

Product Functions
Track by SMS/GPRS (MEITRACK Protocol) Track by SMS/GPRS (MEITRACK Protocol)
Track on Demand
Track by Time Interval
Track by Distance Interval
Track on Mobile Phone
Listen-in (Voice Monitoring)
Internal 4MB Memory for Logging
Inbuilt Motion Sensor
Inbuilt Battery
SOS Alarm
Geo-fence Alarm
GPS Fake Zone Alarm
Low Battery Alarm
Speeding Alarm
Mileage Report

Package Includes
1 x MT90 Personal Tracker
1 x Adapter
1 x Cable
1 x Screwdriver
1 x Sling
1 x CD Driver
1 x User Manual