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This is M177 NRF24L01 2.4GHz Antenna Wireless Transceiver Module. The nRF24L01 is a highly integrated, ultra-low-power (ULP) 2Mbps RF transceiver IC for the 2.4GHz ISM (Industrial, Scientific, and Medical) band. With peak RX/TX currents lower than 14mA, a sub μA power-down mode, advanced power management, and a 1.9 to 3.6V supply range, the nRF24L01 provides a true ULP solution enabling months to years of battery life when running on coin cells or AA/AAA batteries. These RF modules are very popular among Arduino tinkerers. The nRF24L01 is used on a wide variety of applications that require wireless control. They are transceivers which means that each module can transmit and receive data. M177 NRF24L01+ 2.4GHz Antenna Wireless Transceiver Module can be used with Arduino, Mbed, ARM, or any other MCU.

This 3.3V VCC Adapter Board for NRF24L01 Wireless Transceiver Module enables you to use NRF24l01 type transceivers on 5V systems like Arduino. It regulates the 3.3V input to 1.9~3.6V DC and incorporates bypass capacitors for reliable operation. The NRF24L01 utilizes Enhanced ShockBurst (ESB) protocol to support two-way data packet communication with packet buffering, packet acknowledgment, and automatic re-transmission of lost packets.