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Holybro 500mW Telemetry Radio Set (V3 for Pixhawk4)433MHz Features: Transparent, full-duplex serial com-link Hardware flow control Open-source firmware Frequency Hopping Spread Spectrum (FHSS) Protocol Communicates with any 3DR/SiK telemetry radio Pixhawk not required — Easily adaptable to your other projects. Specifications: Radio Frequency: 433MHz Output Power: 20 levels, up to 500mW (27dBm) Size: 53x26x11mm (no antenna) Weight: 14g (no antenna) Rx Sensitivity: -117 dBm Operating range: -40 to 85°C Power Input: 5VDC (via micro-USB or JST-GH) Current, Tx: 500mA @ 27dBm Current, Rx: 25mA Serial (UART) Level: 3.3V Windows USB Device Driver: FT230X Chip Antenna Connector: RP-SMA Status LEDs: Green, blinking: searching for signal Green, steady: link established Red, blinking: transmitting Red, steady: firmware updating No Light: No Power Use Mission Planner, or any Terminal Emulator (AT/RT command set), to change available settings: output power, duty cycle, frequency range, number of channels, listen before Tx, error correction, opportunistic resend, link ID, air speed, MAVLink framing, etc. What’s in the box? 2x Radio Modules (interchangeable) 2x RP-SMA Monopole Antennas 2x 90° RP-SMA Antenna Connectors Micro-USB cable Android OTG cable JST-GH 6P to 6P cable MLX 6P to JST-GH 6P cable 2x Adhesive pads