RockJam Bluetooth Karaoke Machine and PA system with microphones

This is a RockJam Bluetooth Karaoke Machine and PA system. I've opened it to give it all a check and it's all working though full transparency here, one of the microphones was damaged, the metal cage like part at the top and come loose so I put it back on with a bit of wiggling, however I'm not entirely sure if that microphone is working perfectly. Both microphones work but I feel like the other one sounds better. I'm not entirely sure if that's just my imagination but at times I felt my voice sounded odd with the damaged one. However this karaoke machine is £60 to £70 online in many stores so I've priced it fairly low to account for this. Surely the microphone could be replaced fairly cheaply if it's not working properly. Thank you for looking. It includes two wireless microphones. It features four voice-changing effects. The system has a built-in rechargeable battery, making it portable. It connects via Bluetooth to stream music from compatible devices. It has a built-in LED light display that syncs with the beat of the music.