The RP2 series of receivers are open source receivers based on ExpressLRS. Originally developed by Jye of the ExpressLRS development team, the Nano receivers utilize the ESP8285 MCU and the SX1280 RF chip.The RP2 has a built-in ceramic antenna, which is ultra-light and compact, making it perfect for racing. The RP2 has built-in WIFI so you can upgrade the firmware over WIFI and configure the receiver via the built-in WebUl on your PC or cell phone. Thanks to its low latency and high refresh rate RF module, the RP2 is perfect for FPV racing or long distance racing. Thanks to the ultra- and nano-size for Whoops, drones and fixed-wing models, these receivers can be mounted almost anywhere RP2 specification: Name: RP2 Nano Receiver Type: Microcontroller: ESP8285 RF chip: SX1280IMLTRT Antenna: Onboard SMT antenna Frequency range: 2400 MHz to 2480 MHz Maximum receive refresh rate: 500Hz/F1000Hz Minimum receiving refresh rate: 25Hz Working voltage: 5v Firmware version: ExpressLRS v2.4 pre-installed Firmware Target: RP1/2 2400 RX Bus interface: CRSF Material: PC+metal colour: As shown Package Contents: 1 x receiver 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.