DescriptionThis 3DR Radio Telemetry 433MHz 250mW Set allows you to link to a flight controller to a USB or UART equipped device such as a computer, laptop or tablet supporting a USB connection (OTG).The new V2 radios, no longer have a separate Air/Ground module, as both transceivers can use UART or USB connections and supports both modes. The Radio set not only lets you see live data, such as live GPS position overlaid on a map, system voltage, heading, waypoint navigation even artificial horizon and so much more.Using open source MAVlink based ground station software, you can even fly your aircraft with a joystick via your computer and update settings live! Or just use it for your DIY projects that need a wireless Serial interface. This kit offers a great low price, longer range, and superior performance. The system utilizes the 433MHz band and provides a full-duplex link using HopeRF’s HM-TRP modules running custom, open source, firmware.Important Note:  Do not turn ON the 3DR telemetry without attaching the antenna.Features :MAVLink protocol framing status documentsFrequency modulation and Spread Spectrum (FHSS)Self-adaption to time division multiplexingSupport LBT and AFA Configurable duty cycleBuilt-in error correcting code(up to 25% data bit error)AT command configure data transmissionRT command remote control data transmissionInterchangeable air and ground 433MHz modules Micro-USB port6-position Molex connector250mW maximum output power (adjustable)SMA connector2-way full-duplex communication through adaptive TDMUART interfaceTransparent serial linkOpen-source SIK firmwareConfigurable through *Mission Planner and *APM PlannerBased on the HM-TRP wireless module, with Si1000 8051 microcontroller and Si4432Package Includes :1 x Radio Telemetry Base Station (USB Connection).1 x Telemetry Trans receiver (Pin Header).2 x 2.5dbi Antenna.1 x 5-pin Lead cable for APM FC.1 x 6-pin Lead cable for PIXHAWK FC.