REN Number
On the bottom of this equipment is a label indicating, among other information, the Ringer Equivalence Number (REN) for the equipment.
The REN is useful in determining the number of devices you may connect to your telephone line and still have all of these devices ring when your telephone number is called. In most (but not all) areas, the sum of the RENs of all devices connected to one line should not exceed 5. To be certain of the number of devices you may connect to your line as determined by the REN, you should contact your local telephone company.
REN Number is located on the cabinet bottom.
Hearing Aid Compatibility (HAC)
This telephone system meets FCC standards for Hearing Aid Compatibility.
Licensing
Licensed under US Patent 6,427,009.
FCC RF Radiation Exposure
Statement
This equipment complies with FCC RF radiation exposure limits set forth for an uncontrolled environment. This equipment should be installed and operated with a minimum distance of 20 centimeters between the radiator and your body. This transmitter must not be
Information for DECT Product
This telephone is compliant with the DECT 6.0 standard 
which operates in the 1.92GHz to 1.93GHz frequency 
range.