Holybro SiK Telemetry Radio V3 100mW 433MHz / 915MHz Open Source SiK firmware Plug-n-play for Pixhawk Standard Flight Controllers Precise details: -Overview: This Holybro SiK Telemetry Radio is a small, light and inexpensive open source radio platform that typically allows ranges of better than 300m "out of the box" (the range can be extended to several kilometres with the use of a patch antenna on the ground). This radio is plug-n-play all Pixhawk Standard and other Flight Controller, providing the easiest ways to setup a telemetry connection between your Autopilot and a ground station. It uses open source firmware which has been specially designed to work well with MAVLink packets and to be integrated with the Mission Planner, Ardupilot, QGroundControl, PX4 Autopilot. The radios can be either 915Mhz or 433Mhz and you should purchase the model which is appropriate for your country/region. -Note: This new batch of SiK Telemetry Radio V3 does not support firmware upload via Mission Planner 1.3.75 or older. Please use Mission Planner 1.3.75.1 or newer if firmware upload is needed. QGroundControl does not support firmware upgrade for this new batch of SiK Telemetry Radio V3 at this moment. -Features: 1. Open-source SIK firmware 2. Plug-n-play for Pixhawk Standard Flight Controllers 3. Easiest way to connect your Autopilot and Ground Station 4. Interchangeable air and ground radio 5. Micro-USB port (Type-C Adapter Cable Included) 6. 6-position JST-GH connector -Specification: Brand Name: Holybro Item Name: SiK Telemetry Radio V3 Power: 100 mW maximum output power (adjustable) -117 dBm receive sensitivity Connector: RP-SMA 2-way full-duplex communication through adaptive TDM UART interface Transparent serial link MAVLink protocol framing Frequency Hopping Spread Spectrum (FHSS) Configurable duty cycle Error correction corrects up to 25% of bit errors Open-source SIK firmware Configurable through Mission Planner & APM Planner FT230X is a USB to BASIC UART IC -Dimensions: 28 x 53 x 10.7mm (without antenna) -Electrical Data: Supply Voltage: 5V DC (from USB or JST-GH) Transmit Current: 100 mA at 20dBm Receive Current: 25 mA Serial Interface: 3.3 V UART -Package Included: 2x Radio modules with antennas 1x Micro-USB to USB-A cable 1x Micro-USB to Micro-USB OTG adapter cable 1x Micro USB to Type C Adapter 1x JST-GH-6P to JST-GH-6P cable (for Pixhawk Standard FC) JST-GH-6P to Molex DF13 6P (for Pix32, Pixhawk 2.4.6, etc.)