Happymodel ES900RX receiver for 868/915MHz ELRS. ExpressLRS is an advanced open source RC system with long range, low latency, high refresh rate and lots of useful features. Learn more about ELRS here.
The ES900RX receiver measures 12x12x3mm and weighs 0.6g without antenna. There are two types of antennas in the package - a large immortal for long-range flying or freestyle and a smaller mini T for racing drones or whoops.