The documented match is MC120NM to RF399B. A shortened MC120 search or another suffix does not select this exact record. Copy the complete box label before evaluating a handset.
Receiver evidence stays attached to the receiver
The supporting material includes a receiver FCC reference. That field is not used as an FCC ID for RF399B, and it does not establish compatibility with another remote. Component identity and the system-pair statement are separate pieces of evidence.
There is no box substitution claim
The manual’s matching-model statement is useful when checking the remote used with this box. It does not identify a replacement for a failed MC120NM, verify connector pinouts, or establish feature preservation on an unlisted retail base.
Family and exact variant identification
1 reviewed record
These are exact records within the named family. A shared family does not make the entries interchangeable.
Identifiers and limits of the reviewed records
Exact record
Published identifier fields
What still needs checking
MC120NM
product model: MC120NM
receiver fcc reference: 2AK23MC120NM
No reviewed handset FCC ID or feature-preservation guarantee is supplied by this identity record. Check this exact record →
What we verified
Source-specific evidence
Read each row from original to target. A base application or box-to-remote pair is not a remote-to-remote replacement. Known constraints remain part of the decision.
Documented relationships; direction and exact scope matter
Keeson RF399B manual explicitly names matching model MC120NM. This is a documented system pair, not substitution for another box or firmware. Feature preservation on other systems is unknown.
Evidence dates describe the reviewed records. They are not a promise of continuous monitoring. Read the verification method.
RF399B remote user manualDocumented replacement · Keeson Technology Corporation Limited
Reviewed 2026-09-23 · 7 page-relevant assertions.
RF399B manufacturer manual names matching control model MC120NM and receiver FCC ID 2AK23MC120NM. This is not a family-wide MC120 compatibility assertion.
