If you want to make your wireless communication system at low cost, this Wireless Transceiver module is a suitable choice! It provides a good balance between wireless transmission performance and cost. You can integrate it with your own MCU/ARM/PIC/AVR/STM32 system. This NRF24L01+ module features a power amplifier and SMA antenna, enabling 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 module uses Gauss Frequency-Shift Keying (GFSK) modulation and fast Automatic Gain Control. It includes an Interrupt Request (IRQ) pin that can wake the host microcontroller from sleep mode when a transmission is received, helping conserve power in battery-operated devices. Range: 800+ meters (line of sight) Frequency: 2.4GHz – 2.5GHz Working Voltage: 3V – 3.6V max Max Current: 115mA Channels: 125 frequencies Color: Black Material: PCB, plastic, metal Package Contents: 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. Lighting and display differences may cause slight variations in color between the image and the actual item. Measurement error allowance: +/- 1-3 cm.