If you want to make your wireless communication system at a low cost, this wireless receiver module is a suitable choice. It provides a good balance between wireless transmission performance and cost. You can easily integrate it with your own MCU/ARM/PIC/AVR/STM32 system. This NRF24L01+ module is equipped with a power amplifier and SMA antenna, supporting wireless communication up to 800+ meters in line of sight (no obstacles). 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 (250 kbps, 1 Mbps, and 2 Mbps). The on-chip voltage regulator supports supply voltages from 1.9 to 3.6V. The module features 5V tolerant inputs, allowing direct connection of SPI pins to compatible controllers, including those used with Arduino. Internal filtering helps meet RF regulatory standards. The module uses Gaussian Frequency-Shift Keying (GFSK) modulation and fast Automatic Gain Control (AGC). The module includes an Interrupt Request (IRQ) pin that can wake the host microcontroller (e.g., for use with Arduino) from sleep mode when a message is received, enabling significant energy savings in battery-powered devices. Range: 800+ meters line of sight Frequency: 2.4 GHz to 2.5 GHz Working Voltage: 3 to 3.6V maximum Maximum Current: 115mA Multi-frequency: 125 channels Color: Black Material: PCB, plastic, metal Package Contents: 4 x Wireless Module 4 x Antenna 4 x NRF24L01 Wireless Module Breakout Adapter Note: Light and display differences may cause slight variations between the color shown in the image and the actual product. Measurement error allowed is ±1%.