①. If you want to make your wireless communication system with low cost, this Wireless receiver module is a suitable module to choose! It can achieve a good balance between wireless transmission performance and cost! ②. You can easily make it with your own MCU/ARM/PIC/AVR/STM32 system! What's more, this NRF24L01+ module is designed with power amplifier and SMA antenna, this allowed you the wireless communication up to 800+ meters! (No barrier) ③. A host microcontroller can communicate and configure the nRF24L01+ over a 4-pin Serial Peripheral Interface (SPI). The configuration registers are accessible via the SPI connection. Configurable parameters include channel frequency (125 selectable channels), output power, and data rate (data rates: 250kbps, 1Mbps, and 2Mbps). ④. The on-chip voltage regulator accepts supply voltages from 1.9 to 3.6V. The module has 5V tolerant inputs that allow for direct connection of SPI pins to the (compatible with) for arduinoIDE. ⑤. Internal filtering results in high margins of meeting RF regulatory standards. The module radio uses Gauss Frequency-Shift Keying (GFSK) modulation as well as fast Automatic Gain Control (AGC). ⑥. The module contains an Interrupt Request (IRQ) pin that can be used to wake the host microcontroller, (ex: for ArduinoIDE), from sleep when the module receives a mission providing great energy savings in battery power devices. ⑦. Range: 800+ meters line of sight ⑧. Frequency: 2.4GHz ~ 2.5GHz ⑨. Working Voltage: 3~3.6V Max ⑩. Max Current: 115mA ⑪. Multi-frequency: 125 frequency ⑫. Colour: black ⑬. Material: PCB+plastic+metal ⑭. Package Contents: ⑮. 4 * Wireless Module ⑯. 4 * Antenna ⑰. 4 * NRF24L01 Wireless Module Breakout Adapter ⑱. Only the above package content, other products are not included. ⑲. Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/-