Review on 🎤 Vangoa UHF Wireless Microphone System: Professional Dual Channel Handheld Dynamic Mic Set - Perfect for Karaoke, Church, Party, DJ, Meeting, Wedding - 328ft Range, High Sensitivity by Joseph Anderson

I have been using this system for more than 6 months, I like it very much! However, we've only been able to use both mics once or twice, and we do karaoke every week. I've tried syncing by pressing the center sync button and then trying to hold the infrared lens near, far, up, down, north, south. or something else. I canceled the lease and installed new batteries each time. (NOTE: If you leave them on after use, the batteries will die the next time you use them, so I'm taking my batteries out for now). But my question is, is it possible to change the frequency on the microphone. My Orange mic stays at 583,000MHz and never changes, but also never connects to the wireless network as mentioned above. Please advise.