The NRF24L01+ is a small, low-cost 2.4GHz Wireless Transceiver Module that is useful in a wide variety of situations. It is a commonly used module with a lot of Arduino support!
Maximum operating speeds up to 2Mbps, GFSK modulation efficiency, Anti-interference ability, Particularly suitable for industrial control applications.
125 Channels, Multi-point communication and frequency hopping to meet the communication needs
Built-in hardware CRC error detection, Multipoint communication address control.
Low-power 1.9 ~ 3.6V, only 1uA on Power down mode
Built-in 2.4Ghz antenna
Standard DIP Pitch Interface for embedded applications
Size: 29mm X 15.5mm X 4.6mm
NOTE: You must connect these modules to a 3.3V supply, do not use 5V! (The data lines are 5V tolerant, however)
Read here for more information on interfacing with your Arduino: https://playground.arduino.cc/InterfacingWithHardware/Nrf24L01
Datasheet: https://www.diyelectronics.co.za/store/files/nRF24L01P_Product_Specification_1_0.pdf