Description Multi-frequency points: 125 frequency points, meeting the needs of multi-point communication and FM communication. The two LED indicators on the module are a power indicator (red) and an nRF24L01 status indicator (blue/green). Built-in watchdog driver ensures stable operation in harsh industrial control environments. The insertion direction of the nRF24L01 module is shown in the figure. If inserted incorrectly, the system will not work, but the wireless module will not be damaged. Using this module for wireless serial communication can significantly increase the transmission distance (100~1100 meters, the specific distance depends on the power of the wireless module used), far exceeding the transmission distance of Bluetooth serial communication. Suitable for wireless remote control, digital transmission, wireless meter reading systems, wireless detection systems, wireless data acquisition systems, VoIP systems, access control systems, wireless tags, wireless RS232, wireless RS422/RS485 data communication, and other applications. The commands are simple and reliable; communication can begin immediately upon receiving the goods without any setup. System parameters: Supports WINDOWS 98/ME/2000/XP/Server 2003/VISTA/Server 2008/Win7/WIN8 32-bit/64-bit operating systems. The USB wireless serial port transmission module supports AT commands, facilitating clear system configuration for users. It uses a stable CH340T chip to convert USB to serial port. Color: Black. Material: ABS. Package contents: 1 x Debugging test socket. Only the above package contents are included; other products are not included. Note: Light reflection and different monitors may cause the color of the item in the picture to be slightly different from the actual item. The allowable measurement error range is +/- 1-3 cm.