Features:
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<br />1. Real-time tracking
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<br />2. Historical route playback
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<br />3. Geo-fence
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<br />4. SOS alarm & push-button calling
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<br />5. Talking clock
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<br />6. Fall alarm
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<br />7. Vibration on Ring for incoming call reminding
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<br />8. Two-way audio communication
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<br />9. Mute automatic calls answering for voice monitor
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<br />10. Low battery & SIM card change reminders
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<br />Specifications:
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<br />1. Model: RF-V28
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<br />2. 2G GSM 850/900/1800/1900MHz
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<br />3. GPRS: standard
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<br />4. Class 12, TCP/IP
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<br />5. GPS positioning accuracy: 10-15m/32.81- 49.21ft (under the open sky)
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<br />6. Wifi Positioning accuracy: 15-100m/49.21-328.08ft
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<br />7. Battery: Built-in,400mAh
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<br />8. GSM/GPS Antenna: built-in design
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<br />9. Standby time: GSM standby for about 300 hours (GPS closed),about 12 days
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<br />10. GPS standby for 60 hours (10 minutes interval between positionings)
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<br />11. Working temperature: -20 ~ +70 
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<br />12. Working humidity: 5% ~ 95% RH
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<br />13. Positioning time: Cold start 30 Sec
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<br />Warm start 29 Sec
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<br />Host start 5 Sec
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<br />14. Host size: about 40.5*43.3*13.8mm/1.59 * 1.70 * 0.54in
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<br />15. Weight: about 25g
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<br />Packaged accessories:
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<br />1* RF-V28 GPS tracker
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<br />1* USB cable
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<br />1* User manual
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<br />1* Sling
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