4pcs NRF24L01+ Wireless Module with Breakout Adapter 3.3V Regulator On-board for Intellective Car Specifications: On-board 3.3V voltage regulator accepts your Arduino +5V supply and provides 3.3V for the attached nRF24L01+ module Allows for easy connection to Addicore nRF24L01+ modules Small power on SMD LED indicator Voltage Regulator Input Voltage (connected to VCC): 4.8V to 12V Voltage Regulator Input Voltage Max: 15V (we recommend staying below 12V) These Module are Arduino and Raspberry Pi compatible