Features
1.Use Standard GSM SIM card (Not included)
2.Operation Frequency: 4-band (GSM850/900/1800/1900MHz)
3.Sound control dialing
4.Environmental surveillance
5.LBS Positioning 
6.SOS button Emergency Call
7.Real Time GSM/GPRS
8.Voice Callback

Specifications:
1.Color: Black
2.Size: Approx. 35*20*14mm
3.Weight: about 30g
4.Charger Input: AC110-220V 50/60 Hz
5.Charger Output: DC5V 400mA
6.Internal Battery: 3.7V 400mA Rechargeable Li-ion battery
7.Storage Temperature: -40 to 80 degrees
8.Working Temperature: -20 to 55 degrees
9.Humidity: 5%-95% non-condensing10.Standby time: when using sound control, standby time is about 4 to 7 days; when not using sound control, standby time is about 10 to 15 days.

Usage:
After the device is open with a SIM card inside, pls wait longer When U use this device for the first time.
Pls send message to the SIM card inside the device, as follow:
Functions Command
Authorization SQ+ mobile number
Check Lacation DW
Open Voice callback 1111
Close Voice callback 0000
Emergency Alarm SOS
Open monitoring DKJK
Close monitoring GBJK
For example, edit "SQ79609500000"can authorize the number 79609500000.

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