NRF24L01 is a 2.4GHz ISM band transceiver that supports auto-acknowledge and auto-retransmit functions, with the ability to handle up to six channels of data reception. The NRF24L01+ module features a high-performance wireless data transmission chip with an integrated high-power PA and LNA, RF switch, and band-pass filter, enabling full bidirectional RF communication and significantly extending the effective transmission range. The module includes 5V tolerant inputs, allowing direct connection of SPI pins to microcontrollers. This wireless module includes a small power LED indicator on SMD; an onboard 3.3V voltage regulator supports a 5V input supply and delivers stable 3.3V output for the nRF24L01+ module. It is suitable for various applications including wireless remote control systems, sensor devices, RFID, smart grid technology, smart home automation, and wireless o transmission. Specifications: PA Gain: 20dB LNA Gain: 10dB Frequency: 2.4GHz ~ 2.5GHz Range: Over 800 meters line of sight Multi-frequency: 125 channels Transmit Operating Current (Max): 115mA Receiving Operating Current (Max): 45mA Operating Voltage: 3 ~ 3.6V (Recommended 3.3V) Color: Black Material: Plastic + Metal Package Contents: 2 x NRF24L01+PA+LNA Wireless Transceiver RF Module 2 x SMA Antenna 2.4G 1100m 2 x NRF24L01 Wireless Module Breakout Adapter Note: Light and display differences may cause slight variations in color between the image and the actual item. Measurement allows an error of +/- 1-3cm.