Key Specifications/Special Features:

Gps311A,311B,311C
DIM:  60X36X18mm          
GSM Frequency:  4 band 850/900/1800/1900         
GPS sensitivity:  -159dBm           
Battery:  3.7V 180mAh          
Feature:  Accept wide voltage from 8V to 40V(Low voltage version) or 8V-80V(High voltage version), it can work with car, E-bike, motorcycle, etc.  

Function:  
1.Built-in GSM GPS antenna 
2. Mini size 60X36X18mm,easy install
3. Waterproof 
4. Realtime tracking by SMS /Web platform /Mobile app 
5. Alarms:
Low battery alarm 
Power off alarm
Geofence 
Movement alarm 
over speed alarm 
Acc alarm 
6.Engine stop (for model B,C)  
7.SOS alarm (for model C only )       
8.ARM / DISARM by remote controller (for model C only)
9.Sleep mode to save power 
10.GPRS mode to save GPRS data 
11.Balance checking

Specifications:
DIM. 6.03.51.8cm
Weight 50g
Network GSM/GPRS
Band frequency 850/900/1800/1900Mhz
GPS sensitivity -165dBm
GPS accuracy 5m
GPS starttime
Cold status 45s
Warm status 35s
Hot status 1s
H version(High voltage version): 8V-80V
L version(Low voltage version): 8V-40V
Backup battery Chargeable 3.7V 180mAh Li-ionbattery
Storage Temp -40°Cto+85°C
Operation Temp. -20°Cto+65°C
Waterproof grade IP67