Features: RF-Nano compatible Nano-V3.0 integrated NRF24L01 wireless CH340 serial-port modules; This original version adopt chip in QFN32; Improved version replaced with QFP32 packaged ATMGEA328P-AU chip to reduce cost,same functional application; The NRF24LO1+ chip is integrated on the RF-NANO board, which makes it have unlimited-transceiver functions, which is equivalent to combining an ordinary Nano board and an NRF24LO1 modules into one, It is more convenient to use and small in size The RF-NANO has exactly the same pin as the common Nano board. Specifications: Material:PCB- Option Type:Original version with Micro port,Improved version with Micro port ,Improved version with Type C port; A is Original version with Micro port; B is Improved version with Micro port; C is Improved version with Type C port; Package Includes: 1xRF-Nano module- note: Please allow 1-2cm errors due to manual measurement,please make sure that you do not mind before you order. Due to the difference between different monitors, the picture may not reflect the actual color of the item.