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 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 allows 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 (compatible with) ArduinoIDE. 5. Internal filtering results in 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 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: 4 * Wireless Module, 4 * Antenna, 4 * NRF24L01 Wireless Module Breakout Adapter. Only the above package content, other products are not included. 15. 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 +/-