The RN4020 PICtail / PICtail Plus Board is a Bluetooth? Low Energy demonstration board that showcases the Microchip RN4020 module, a fully-certified Bluetooth Version 4.1 low energy module for designers who want to easily add low power wireless capability to their products. This development board includes the RN4020 paired with an eXtreme Low Power PIC18F25K50 microcontroller.