3DRobotics 915MHz 500mW Radio Telemetry for PX4/APM/Pixhawk

500mW sits in a genuinely useful middle ground for telemetry radios - enough output to comfortably cover mid-range missions that a 100mW kit would start to struggle with, without stepping up to the size, weight, and price of a 1W unit built for genuinely long-range work. Running at 915MHz keeps it clear of the more congested 433MHz band where that frequency sees heavier local traffic, a real consideration for pilots flying in areas with a lot of other 433MHz gear nearby.