Wrist GPS Tracker for Human and Pets wholesale china

Overview:
GPS-830E/G GPS wrist tracker is a stylish device with built-in GPS and GSM modules and high performance antenna
System operation is both by SMS and monitoring center (GPRS)
LCD screen displays system setting/coordination data/satellite indicator
Its watch design will satisfy your loved kids and elders
Features:
GPS SiRF-Star III chipset fast fixing the position even at a weak signal status
Works worldwide, supports 3-frequency GSM 900/1800/1900MHz
Receive phone calls, SMS, and GPRS in three way communications
Monitors can track the device without interfering him, live real-time tracking
SOS button send out exact location for immediate rescue/action
Independent SOS button which will send GPS information via SMS for 1 to 5 preset numbers
System setting by SMS free
Low battery notification before the battery runs out, worrying free on why the locater wouldn5798439284 respond for this kind of situation
Speed limit alarm
Multi-user management on website (GPRS mode)
It has data logging function and records up to 20,400 way points
The wrist GPS tracker can display the time and positions of the wearer
With A-GPS, the receiver can acquire satellites, and provide accurate position data instantly on demand, even under poor signal conditions
Specification:
GSM/GPRS:
GSM/GPRS (module): Simcom300 tri-band GSM module (GSM900/1800/1900MHz)
GSM antenna: built-in
Protocol: supports TCP transmission
GPS:
GPS module: SiRF III 20 channels
Protocol: NMEA-0183 compliant protocol
GPS antenna: built-in active high sensitivity antenna
Accuracy: 1 to 5m
Update rate: 1Hz
Start time:
Cold start: 42s
Warm start: 35s
Hot start: 1s
Electrical:
Operating voltage: 3.4 to 4.5V
Charge voltage: 4.5 to 5V
Standby: 15mA