By popular demand, we now have a range of RadioMaster receivers that are upgraded to V2 version. The R81 V2 receiver is Frsky D8 / D16 and Futaba SFHSS Compatible and offers a range suitable to drones and RC modelers. Specification Type: R81 - D8 Nano Sbus Receiver Channels: 8 Frequency range: 2400-2483.5Mhz Power input range: 4.5-6V Signal format: D8, D16 & SFHSS Compatible Output format: SBUS RSSI: RSSI on Ch9 of Sbus Output Range: more than 1km Antenna length: Approximately 6cm Size: 17x11mm Weight: 2 grams