Match the complete model suffix and the original control-system label. This manufacturer-authored document identifies a particular remote model; same radio family, appearance, or button count does not confirm replacement compatibility. Customer-specific part code and firmware may still be required.
Replacement fit is not confirmed by the family name. Copy the full part number and revision from the remote back, battery compartment or accessible control-box label. If it is unsafe to reach a label, ask for help.
For support, record the complete remote and control-box labels, base model, revision and observed symptom. Ask the manufacturer to confirm a directed replacement and any pairing or feature limitations in writing.
The final B is part of the identity
The exact reviewed remote model is RF399B. The document names MC120NM as its matching control box. No alternate RF399 suffix or universal RF-series application is included.
Don’t copy the receiver’s FCC reference as the remote’s ID
A receiver FCC reference occurs in the supporting material. It is not assigned as a handset FCC ID in this dataset. Copy identifiers from their own labels; a number printed in a system manual can describe a different component.
What this pair confirms
The row below identifies the documented remote for this box. It doesn’t name RF399B as another remote’s successor, identify a replacement box, or confirm features on an unlisted base. A different box label needs its own check.
All part identifiers and configuration details
Identify the exact version
1 reviewed record
These are different versions within this family. Check the full identifier; they aren’t automatically interchangeable.
Part identifiers and details to check
Part or version
Documented label details
What still needs checking
RF399B
product model: RF399B
This identification record doesn’t provide a verified remote FCC ID or guarantee which features will be preserved. Check this exact part →
Detailed relationship records and source claims
What the sources confirm
Source-specific evidence
Read each match in the direction shown and check its conditions. A listed base or control-box match tells you which remote it uses; it doesn’t name a replacement for another remote.
Documented matches: check the direction and conditions
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 relevant claims.
Match the complete model suffix and the original control-system label. This manufacturer-authored document identifies a particular remote model; same radio family, appearance, or button count does not confirm replacement compatibility. Customer-specific part code and firmware may still be required.
Does MC120NM prove a match for every RF399 remote?
The reviewed manual names RF399B specifically.
Why is the handset FCC field blank?
No complete handset FCC ID has been assigned from the reviewed evidence; the receiver reference is kept separate.
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