500mV Transceiver Telemetry Radio Set 433MHz Air and Ground Modules Data Transmit Module for APM Pixhawk Flight Control FPV Compact Size Description‎:‎ The Radio Telemetry kit offers a great low price‎,‎ longer range ‎(‎approx one mile with supplied antennas‎)‎ and superior performance‎.‎ The system utilizes 915Mhz / 433Mhz band and provides a full‎-duplex link using HopeRF\'s HM‎-TRP modules running custom‎,‎ open source firmware‎.‎ The Sik firmware includes a bootloader that permits radio firmware upgrades over the serial interface‎,‎ and configuration of system parameters‎.‎ Firmware upgrades and configuration are fully supported in the APM Mission Planner‎.‎ Configuration is also possible through the 3DR Radio configurator and AT commands‎.‎ Interface to the module is via standard 5V‎-tolerant TTL serial / FT230 USB serial‎.‎ Kick your mission planning into real time with Radios‎,‎ featuring interchangeable air and ground modules‎,‎ Android tablet compatibility‎,‎ and protective cases‎.‎ Radios allow your ground station computer to communicate with your vehicle wirelessly‎,‎ providing unparalleled ease of use for viewing in‎-flight data‎,‎ changing missions on the fly‎,‎ and tuning 915MHz and 433MHz available‎.‎ Specification‎:‎ Interchangeable air and ground modules Micro‎-USB port ‎-117 dBm receive sensitivity 433 MHz 6‎-position Molex connector 500mW maximum output power‎(‎adjustable‎)‎ SMA connector 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 and APM planner Supply voltage‎:‎ 3.7‎-6VDC‎(‎from USB or molex connector‎)‎ Transmit current‎:‎ 500mA at 27dBm Receive current‎:‎ 25mA Serial interface‎:‎ 3.3V UART Features‎:‎ Sensitivity‎:‎ 117dBm Frequency‎:‎ 433MHz Output power‎:‎ 500mW‎(‎maximum‎)‎ Voltage‎:‎ 3.7‎-6V Transmit current‎:‎ 500mA Receive current‎:‎ 3.3V Package included‎:‎ Radio modules with antennas * 2 Micro‎-USB cable * 1 Android OTG adapter cable * 1 6‎-wire Pix32 connector cable * 1 6‎-to‎-5‎-position APM and PX4 connector cable * 1