Waitrack GPS Vehicle tracker User Manual page 6

NOTE:
4.2.1 To prevent theft of the device, it should be installed as covertly as
possible. Covertly installation is suggested.
4.2.2 Avoid placing the device close to higher power electrical devices, such
as reversing radar, anti-theft device or other vehicle communication
equipment;
4.2.3 The device should be fixed into position with cable ties or wide
double-side tape.
4.2.4 The device has built-in GSM antenna and GPS antenna. During
installation, please make sure the receiving side face is up, with no
metal object above the device to interfere with GPS reception. The
following places are suggested for installation:
-shelter in the decorated board below the front windshield;
-shelter around the front instrument panel (non-metallic material face);
-in the decorated board below back windshield;
Notice: if the windshield is pasted with metal thermal-protective coating or
heating coating, It may affect the receiving signal. In this case, please change
the installation place.
4.3 Device outlet specification