Radiomaster R81 receiver

Specification
Type: R81 - D8 Nano Sbus Receiver
Channels: 8
Frequency range: 2400-2483.5Mhz
Power input range: 4.5-6V
Signal format: Frsky D8 Compatible
Output format: SBUS
RSSI: RSSI on Ch9 of Sbus Output
Range: more than 1km
Antenna length: Approximately 6cm
Size: 17x11mm
Weight: 2 grams