If you want to build a wireless communication system at low cost, this wireless receiver module is an ideal choice. It offers a good balance between wireless transmission performance and affordability. You can easily integrate it with your own MCU/ARM/PIC/AVR/STM32 system. This NRF24L01+ module features a built-in power amplifier and SMA antenna, allowing for long-range wireless communication. A host microcontroller can communicate with and configure the nRF24L01+ through a 4-pin Serial Peripheral Interface (SPI). The configuration registers are accessible via the SPI interface. Adjustable 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, enabling direct connection of SPI pins to compatible controllers. Internal filtering ensures high compliance with RF regulatory standards. The module uses Gauss Frequency-Shift Keying (GFSK) modulation and fast Automatic Gain Control (AGC). It also includes an Interrupt Request (IRQ) pin that can wake the host microcontroller from sleep mode when a signal is received, helping to save energy in battery-powered devices. Range: Up to several hundred meters in open space Frequency: 2.4GHz ~ 2.5GHz Working Voltage: 3~3.6V Max Current: 115mA Channels: 125 Color: Black Material: PCB + Plastic + Metal Package Contents: 4 x Wireless Module 4 x Antenna 4 x NRF24L01 Wireless Module Breakout Adapter Note: Only the above items are included. Other products in the image are not included. Due to lighting and display differences, there may be slight color variations between the image and the actual product. Some measurement error is allowed.