For a low-cost wireless communication system, this wireless transceiver module is the ideal choice, offering a great balance between wireless transmission performance and cost. Easily integrate it with your MCU/ARM/PIC/AVR/STM32 system. This NRF24L01+ module is equipped with an amplifier and SMA antenna, enabling wireless communication up to 800+ meters (line of sight). A host microcontroller can communicate with and configure the nRF24L01+ via a 4-pin Serial Peripheral Interface (SPI). Configuration registers are accessible through the SPI connection. Configurable parameters include channel frequency (125 selectable channels), output power, and data rate (250kbps, 1Mbps, and 2Mbps). The onboard voltage regulator accepts supply voltages from 1.9 to 3.6V. The module features 5V tolerant inputs, allowing direct connection of SPI pins to Arduino IDE. Internal filtering provides high margins to meet RF regulatory standards. The module radio utilizes Gauss Frequency-Shift Keying (GFSK) modulation and fast Automatic Gain Control (AGC). It includes an Interrupt Request (IRQ) pin that can wake the host microcontroller (e.g., Arduino IDE) from sleep mode when a transmission is received, offering significant power savings for battery-powered devices. Range: 800+ meters line of sight Frequency: 2.4 GHz ~ 2.5 GHz Working Voltage: 3~3.6V Max Current: 115mA Multi-frequency: 125 frequencies Color: Black Material: PCB+plastic+metal Package Contents: 4 * Wireless Module, 4 * Antenna, 4 * NRF24L01 Wireless Module Breakout Adapter. (Other products are not included.) Note: Light and different displays may cause the color of the item in the picture to be slightly different from the real thing. The allowed measurement error is +/- 1-3 cm.