This product communicates through WiFi. There are two output interfaces and software which can set the communication rate by themselves. The same frequency and the same version of the firmware can communicate with each other. Operating frequency is 922 MHz to 928 MHz, output power is 0.5 W, - 126 dBm ultra-high receiving sensitivity; built-in antenna, using RS232 interface to connect PC or RS232 interface for data transmission equipment, can change internal settings through software to avoid similar frequency interference. Through wireless transmission, solve the problem of cable product wiring is not long enough.