The NRF24L01 is a 2.4 GHz ISM band transceiver featuring auto-acknowledgement and auto-retransmission, supporting up to six data channels. High-Performance Wireless Data Transmission: The NRF24L01+ module incorporates a high-PA and LNA chip, RF switches, and bandpass filters for enhanced bidirectional RF communication, significantly extending the effective communication range. 5V-Tolerant Inputs: The NRF24L01 module boasts 5V-tolerant inputs, allowing direct connection of SPI pins. Wireless Module Features: Small SMD LED indicator; Built-in 3.3V voltage regulator accepts +5V supply and provides 3.3V for the connected NRF24L01+ module. Wide Applications: Ideal for wireless remote control, somatosensory devices, RFID, NFC, smart grids, wireless audio, and more. Specifications: PA Gain: 20dB LNA Gain: 10dB Frequency: 2.4 GHz ~ 2.5 GHz Range: 800+ meters (line of sight) Multi-frequency: 125 frequencies Transmission Current (Max): 115mA Reception Current (Max): 45mA Operating Voltage: 3 ~ 3.6V (3.3V recommended) Color: Black Material: Plastic + Metal Package Contents: 2 * NRF24L01+PA+LNA Wireless Transceiver RF Transceiver Module 2 * SMA Antenna 2.4G 1100m 2 * NRF24L01 Wireless Module Breakout Adapter Note: Only the above package content is included; other products are not included. Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.