Smart Mini Necklace Personal sos Locator Device Micro Android  AND IOS GPS/GSM Tracker AVP031D19

Features:

1. GPS/Beidou + base station +WIFI multiple tracker 
2. SOS emergency alarm

3. Voice time

4. Two-way calling

5. Electronic fence 
6. Voice monitoring H

7. istorical track 
8. Do not disturb mode 

Specification:

Size: 52*42.5*18mm 
Package size: 120*78*40mm 
GPRS Mode: 900/1800/1900Mhz

Battery:Gel polymer 400mA

Support 2G GSM SIM card

Chipset: MT2503, built-in high sensitivity ceramic antenna 
GPS,WIFI and LBS three mode positioning

Standby time:about 5 days

Color:red,blue

Support G-sensor

APP:Android 4.0 or above,IOS 8.0 or above