diff --git a/docs/ble-bridge-wiring.md b/docs/ble-bridge-wiring.md
index 41eb8e8..83aa7f6 100644
--- a/docs/ble-bridge-wiring.md
+++ b/docs/ble-bridge-wiring.md
@@ -224,7 +224,7 @@ ESP32 GND               ──► RYS352A GND
 | VCC | 3V3 | 3.3V power (onboard LDO on most breakouts) |
 | GND | GND | Ground |
 | TX | GPIO5 (UART2 RX) | NMEA sentence output at 115200 baud |
-| RX | GPIO6 (UART2 TX) | UBX/NMEA config input (optional) |
+| RX | GPIO6 (UART2 TX) | PAIR/NMEA config input (optional) |
 | PPS | GPIO7 | 1Hz pulse synchronized to GPS time |
 
 **PPS (Pulse Per Second):** The RYS352A outputs a precise 1Hz pulse on the
@@ -233,10 +233,14 @@ this edge via interrupt (`micros()` timestamp) for correlating satellite events
 with sub-microsecond precision relative to the GPS epoch. The module's RTC
 battery backup enables warm starts (~5s) after initial cold start fix (~30-60s).
 
-**UART notes:** The RYS352A defaults to 115200 baud NMEA output. The TX line
-(GPIO6) is optional — only needed if you want to send UBX configuration
-commands to change update rate, constellation selection, or enable additional
-NMEA sentences. The firmware uses TinyGPS++ to parse standard GGA/RMC sentences.
+**UART notes:** The RYS352A defaults to 115200 baud NMEA output with `GN`
+talker ID (multi-constellation). The TX line (GPIO6) is optional — only needed
+to send `$PAIR` proprietary commands (Airoha AG3352 engine) for changing
+update rate (`$PAIR050`), constellation selection (`$PAIR066`), PPS config
+(`$PAIR752`), or NMEA sentence output rates (`$PAIR062`). See
+`docs/RYS352x_PAIR_Command_Guide.md` for the full command reference.
+The firmware uses TinyGPS++ v1.1+ to parse standard GGA/RMC sentences —
+v1.1 is required for `$GNGGA`/`$GNRMC` (multi-GNSS talker ID) support.
 
 ## Full GPIO Map