Item Type: Data Acquisition Module_x000D_ Material: Plastic_x000D_ Support System: For Windows 98/ME/2000/XP/Server 2003/VISTA/Server 2008/Win7/WIN8 32 Bit/64 Bit_x000D_ Wireless Serial Port Transmission: USB Wireless Serial Port Transmission Module, Support at to Configure the System Clearly_x000D_ CH340T Chip: Use Stable CH340T Chip As Usb to Serial Port._x000D_ Multi Frequency Points: 125 Frequency Points, Meeting the Needs of Multi Points Communication and FM Communication._x000D_ LED Lights: the Two LED Lights of the Module Are Power Indicator (Red) and NRF24L01 Status Indicator (Blue/Green)._x000D_ Built in Watchdog Anti Driver Program: It Can Run Stably in Harsh Industrial Control Situations._x000D_ Transmission Distance: Using This Module for Wireless Serial Communication Can Make the Transmission Distance Farther (100~1100m, Depending on the Power of the Wireless Module Used), Far Exceeding the Transmission Distance of the BTSerial Port (10m)