If you want to build a cost-effective wireless communication system, this Wireless Transceiver module is an excellent choice. It offers a reliable balance between performance and affordability. You can integrate it with your own MCU/ARM/PIC/AVR/STM32 system. This NRF24L01+ module features a built-in power amplifier and SMA antenna, supporting wireless communication of up to 800+ meters in line-of-sight conditions. A host microcontroller can communicate with and configure the nRF24L01+ via a 4-pin Serial Peripheral Interface (SPI). The 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 on-chip voltage regulator supports supply voltages from 1.9V to 3.6V. The module has 5V-tolerant inputs, allowing direct connection of SPI pins to compatible controllers, including Arduino. Internal filtering helps meet RF regulatory standards. The radio uses Gaussian Frequency-Shift Keying (GFSK) modulation and includes fast Automatic Gain Control. The module includes an Interrupt Request (IRQ) pin that can wake the host microcontroller (e.g., for use with Arduino) from sleep mode upon receiving a transmission, enabling significant energy savings in battery-powered applications. Range: 800+ meters (line of sight) Frequency: 2.4GHz 2.5GHz Operating Voltage: 3V 3.6V max Max Current: 115mA Channels: 125 frequencies Color: Black Material: PCB, plastic, metal Package Includes: 4 x Wireless Module 4 x Antenna 4 x NRF24L01 Wireless Module Breakout Adapter Note: The package includes only the items listed above. Other products are not included. Note: Lighting and display differences may cause slight variations in color between the image and the actual item. Measurement error allowance: +/- 1-3 cm.