I use VocoPro’s cheap VHF microphones. They come in a set of 4 with a receiver. I’ve bought 3 of these sets in the last 4 and half years. They get dropped so often, that some no longer work at all, and some work, but not well enough for me to feel that I can use them at karaoke shows. Interestingly, there’s some, that still work, but the outer plastic is cracked and ugly. Or in one case, the on/off switch sticks. I’ve found something fun to do with those. Light Saber Microphone!