Welcome the new FrSky R9 Slim+ over the air (OTA) receiver. The 900MHz R9 Slim+ OTA receiver implements the ACCESS protocol and 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 Slim+ OTA is designed with dual antennas to improve signal strength. With a compact form factor design, it also features 6 PWM outputs, and this long range receiver with the flexibility to work with more external devices by incorporating the inverted SBUS and S.Port outputs.