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 Colour:black Material:PCB Package Contents: 20 x Receiver 40 x Heat Shrink Tubing 20 x 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.