RadioMaster R81 Receiver

Specifications Channels: 8CH Frequency range: 2400-2483.5Mhz Power input range: 4.5-6V Signal format: FrSky D8 Compatible Output format: SBUS (Inverted)  Support return: support return RSSI Control distance: more than 1km Antenna length: Approximaltly 6cm Size: 17*11 mm Weight: 2g Includes 1x RadioMaster R81 SBUS D8 2.4GHz Nano Receiver Bind method: 1. Press and hold the BIND button on the receiver then connect power. After approximately 3 seconds, the receiver LED will be RED, the receiver is now in bind mode 2. Select the D8 protocol for the multi-protocol menu of your remote control, and press the [BIND] option, the red light of the receiver will flash indicating successful bind 3. Exit bind mode on your remote control and disconnect power to the receiver then power the receiver once more. The LED will now be solid RED indicated the bind is now done. If not please repeat step 1 and 2  Fail-safe Protection: 1. Press the BIND button once within 10 seconds of the receiver being pow