iv 
List of Symbols 
The following is a list of symbols that might appear on the NVR. 
Symbol  Explanation 
 
The WEEE symbol. 
This symbol indicates that when the end-user wishes to discard this 
product, it must be sent to separate collection facilities for recovery 
and recycling. By separating this product from other household-
type waste, the volume of waste sent to incinerators or landfills will 
be reduced, and thus natural resources will be conserved. 
 
The UL compliance logo. 
This logo indicates that the product has been tested and is listed by 
the Underwriters Laboratories. 
The FCC compliance logo. 
This logo indicates that the product conforms to Federal 
Communication’s Commission compliance standards. 
 
The direct current symbol. 
This symbol indicates that the power input/output for the product is 
direct current. 
 
The alternating current symbol. 
This symbol indicates that the power input/output for the product is 
alternating current. 
The LDPE symbol. 
This symbol indicates that this product is made of Low-Density 
Polyethylene (LDPE). 
 
The Direct Current symbol. 
This symbol indicates that the product operates from a 12 V direct 
current. 
The Lead-free symbol. 
This symbol indicates that the product does not contain lead (Pb). 
 
The CCC compliance logo. 
This logo indicates that the product conforms with the China 
Compulsory Certification guidelines. 
The Environment Friendly Use-period symbol. 
This symbol indicates the length of time that this electronic product 
can used without harming the environment. 
The RCM Compliance symbol. 
This symbol indicates that the product conforms with the Australian 
RCM guidelines.