[RF NANO]: The main chip is ATMEGA328P-MU QFN32, and the latest bootloader (compatible with Arduino IDE 1.8.8) is programmerd.[STRONG FUNCTION]:compatible with Emakefun RF-Nano-Board integrates a NRF24L01+ module with arduino nano v3.0 board, which is very convenient compatible with application scenarios such as directly connect various wireless.[HIGH QUALITY]: plastic material and Immersion Gold Technology,keep great quality.[SMALL VOLUME]:The PCB size is only 48mm x 18mm, the pin is fully compatible with Nano V3.0,No Soldering needed. The micro-usb port is more convenient to use.Architecture AVROperating Voltage 5 VFlash Memory 32 KB of which 2 KB used by bootloaderSRAM 2 KBClock Speed 16 MHzAnalog I/O Pins 8EEPROM 1 KBDC Current per I/O Pins 40 mA (I/O Pins)Input Voltage 7-12 VDigital I/O Pins 22PWM Output 6Power Consumption 19 mAColour:blackMaterial:plasticPackage Contents:1 * USB Upgrade Board compatible with Arduino Nano V3.0Only the above package content, other products are not included.Note: Light shooting 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.