Adopts IPEX1 first-generation antenna base and external T-shaped antenna These receivers are ultra-light and ultra-small in size, making them easy to carry Great for FPV matches and long distances Excellent material, not easy to damage The Nano receiver (2.4G version) is a receiver with a power amplifier (PA+LNA). It has 100mW telemetry output and better sensitivity at longer distances Name:ELRS 2.4G receiver Firmware: 2400 Nano Antenna interface: 1 Working voltage:4-5.5V Maximum refresh rate:500Hz Minimum refresh rate:25Hz Type:ISM Working Agreement:CRSF The product appearance and printed words depending on the batch, but this does not affect use. Colour:Black Material:PCB Package Contents: 4 * Receiver 4 * Antenna 8 * Heat Shrink Tubing 4 * Connection Cable Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.