GPS Personal Tracker wholesale china

Basic features:
Built-in GPS personal locater
Supports 4-frequency: GSM 850/900/1800/1900MHz
High sensitivity, new technology and latest GPS SiRF star III chipset
Compact size, and smaller than one name card, easy to hide
Very low power consumption
Fast signal acquisition
Supports single location and continuous tracking
Supports defined Geo-fence exceed trigger alarm
Supports alarm and remote monitor
Supports quick dialing buttons for 2 preset phone numbers
Supports check location by SMS and Internet
Monitors can track the person without interfering him
SOS button send out exact location for immediate rescue/action
No monthly service charges to be paid to the call center
Extend function:
Built-in speaker and microphone
Supports two-way conversation without ear microphone (handsfree)
Built-in motion sensor for power saving
Built-in motion sensor for vibration alarm
Voice monitoring function (wiretapping)
Removable internal battery
Specifications:
GSM module: Embedded GSM 900/1800/1900MHz and GPRS TCP/UDP
GPS chipset: Latest GPS SiRF star III chipset
GPS sensitivity: -158dB
GPS frequency: L1, 1575.42MHz
C/A code: 1.023MHz chip rate
Channels: 20CH all-in-view tracking
Position accuracy: 10m, 2D RMS
Velocity accuracy: 0.1m/s
Time accuracy: 1us synchronized to GPS time
Default datum: WGS-84
Reacquisition: Average 0.1s
Hot start: Average 1s
Warm start: Average 38s
Cold start: Average 42s
Altitude limit: 18, 000m (60, 000 feet) maximum
Velocity limit: 515m/second (1000 knots) maximum
Jerk limit: 20m/sec
Operating temperature: -25 to 6549840 C
Humidity: 5 to 95% non-condensing
Dimension: 76 x 44 x 20mm (13mm)
Weight: 75g
Voltage: Rechargeab