GPS Personal Tracker has the following features
Tracking via SMS or GPRS (TCP)
Current location report
Tracking by time interval
Two-way conversation
SOS alert
Geo-fencing control
Low battery alert
Speeding alert

Four buttons for making phone call and/or sending message
Removable and rechargeable internal battery
Built-in speaker and microphone
alert when Track enter/exits GPS blind area
Live Voice monitoring
Track Parameters& Panel Description

Specification
Charging Voltage: DC 5V/500mA (Micro USB port)
Internal Battery: Rechargeable and removable 830 mAh battery (3.7V)
Operating temperature: -20° To 55°
CHumidity: 5% to 95% Non-condensin g
GSM module: GSM 900/1800/1900MHz
GPS Chipset: Latest GPS (AGPS)
GPS Sensitivity: -158dB
GPS Frequency: L1, 1575.42 MHz
C/A Code: 1.023 MHz chip rate
Channels: 20 channel all-in-view tracking
Position Accuracy: 10 meters, 2D RMS
Velocity Accuracy: 0.1 m/s
Time Accuracy: 1 us synchronized to GPS time

Default datum: WGS-84
Reacquisition: 0.1 sec., average
Hot start: 1 sec., average
Warm start: 38 sec., average
Cold start: 42 sec., average
Altitude Limit: 18, 000 meters (60, 000 feet) max.
Velocity Limit: 515 meters/second (1000 knots) max.
Acceleration Limit: Less than 4G
Jerk Limit: 20 m/sec
Work time: 60 hours in sleep mode and 10 hours in normal mode
LED: 3 LED indicators showing power, GPS, GSM status and other operation status.