If your neighbours get upset with you banging out your best karaoke singing voice into the early hours. You might consider investing in the silent karaoke Mute-Mic. Which allows you to sing as loud as you like without upsetting the neighbours.
The Mute-Mic does the opposite of a normal microphone and creates a cone of silence around the microphone itself, so all you hear on your headphones is your voice. It connects via USB and his 100% compatible with the Nintendo Wii. Let the good times roll..
Available for $53 from the Japan Trend Shop