NRF24L01 + / NRF24L01 + PA + LNA
The NRF24L01 + is a 2.4 GHz transceiver with a built-in hardware protocol (Enhanced ShockBurst ™), made for ultra-efficient wireless applications. The nRF24L01 uses the 2,400 - 2.4835GHz band to communicate. This module can be accessed with the Serial Peripheral Interface (SPI). The configuration registers of the module can also be changed via SPI.
The + version has an external antenna, power amplifier (PA) and a low noise amplifier (LNA), making the range of the NRF24L01 + PA + LNA module even larger than the module with only the internal antenna.