* GSM quad-band network, GPS location
*Tracking via Internet / iphone app/ Android app / we chat / SMS
* Click for SOS
* Click for call
* 2 way communication
* Hand-free for talk
* Quiet care
*Low battery alert
*Change SIM alert
* GSM network: 850/900/1800/1900MHz
*GPRS standard: Class 12, TCP/IP
* GPS locating time:
*30sec with cold boot(open sky)
*29sec with warm boot(open sky)
*5sec with hot boot (open sky)
* GPS Positioning accuracy: 10-15m
*Working ptemerature: -20℃ ~ +70℃
* Working humidity: 5% ~ 95% RH
*Host size: 40x34 x14mm
*Host weight: 27g
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