RDL WiFi Eight Channel Relay Application controls the relay by turning the WiFi Relay board On/Off. A prerequisite for using is that the app mobile phone must be connected with the WiFi network generated by WiFi Relay board. The User must enter the IP-Address and port number in the mobile phone before controlling the relay. Then click on the start button to control the relay by either turning it on/off. This new and latest app supports the mobile phone running android OS 9.0 and also lower versions.