The FrSky Long Range Receiver 900MHz R9 MM-OTA implements the ACCESS protocol and brings the user improved performance and features. The R9 MM-OTA supports wireless firmware updates over the air making binding to receivers even easier. As well as the convenience of checking the current receiver firmware version. The R9 MM’s compact form factor design is also carried over to the OTA version, and the R9 MM-OTA supports inverted S.Port as well.

This FrSky Long Range Receiver R9 MM-OTA works compatible with the new release R9M Lite Pro module,and the other 900MHz modules will also be supported when the ACCESS firmware is available.

FrSky Long Range Receiver R9 MM-OTA SPECIFICATIONS

Dimension: 16*10*2.8mm (L×W×H)
Weight: 0.7g (without antenna)
Number of Channels:
Non-LBT Version: 4/16CH (Telemetry)
LBT Version: 4/16CH (Telemetry) / 4/16CH (No Telemetry)
Operating Voltage Range: DC 3.5V – 10V
Operating Current: 100mA@5V
Operating Range: Up to 10km or above
Compatibility: R9M Lite/R9M/R9M 2019 with ACCST firmware
R9M Lite/R9M Lite Pro/R9M 2019 with ACCESS firmware

FrSky Long Range Receiver R9 MM-OTA FEATURES

915MHz (Non-LBT Version)/ 868MHz (LBT Version)
Mini size and super lightweight
Supports OTA firmware update
Supports firmware version check
S.Port enabled and support telemetry data transmission
(Support F.Port, download firmware to support the function)
Inverted S.Port enabled
Low latency and high precision
With RSSI output in SBUS
Battery voltage detection supported
Detachable Ipex connector antenna

FrSky Long Range Receiver R9 MM-OTA Including :

1x R9M 2019 module with mounted Super 8 antenna
1x R9 MM OTA with mounted Ipex4 T antenna

From: https://www.horusrc.com/en/frsky-promotional-r9m-and-r9-mm-combo.html