FrSky

FrSky D4R-II 4ch 2.4Ghz ACCST Receiver (w/telemetry) Compatibility: Compatible with FrSky two-way telemetry modules: DFT, DJT, DHT, DHT-UFeatures:• RSSI (PWM) and CPPM output.• Lighter weight and physically smaller than D8R-II & D6FR• Integrated warning alarm for low voltage, poor reception, etc.• One external analog telemetry port and one digital data-stream port (Connects to FrSky Sensor Hub FSH-01). Specs:Number of Channels: 4Operating Voltage Range: 3.5V~10VOperating Current: 60mAOperating Range: Full Range (>1.5km)Dimension: 40x22.5x6mmWeight: 5.8g