I purchased this in 2014, but I'm selling it because I haven't had a chance to use it. I think I used it about 10 times for karaoke back then. I've confirmed that the wireless microphone connects with the blue light on. There are no noticeable scratches, but please check the photos for the condition. The following is quoted from the Nintendo HP: Release date: December 12, 2013 Suggested retail price: 3,800 yen + tax This is a wireless microphone that is used by connecting the included receiver to the USB port of the Wii U console. ■Wii U Wireless Microphone Microphone directivity: Unidirectional Audio format: Mono Communication standard: DECT External dimensions: Diameter 59.4mm x Length 227mm *Maximum diameter of the handle 36mm Weight: Approximately 200g (including batteries) Battery life: Approximately 40 hours Other features: The power automatically turns off if there is no voice input for 5 minutes. ■Wii U Wireless Microphone Receiver Communication standard: DECT Input/output terminals: USB terminal External dimensions: Length 62mm x Width 18.8mm x Thickness 7.8mm Weight: Approximately 10g ■HORI Microphone Cover for Wii U High soundproofing effect! By using this product in close contact with your mouth without any gaps, you can easily obtain a high soundproofing effect. According to our measurements, the effect is a maximum of minus 30 decibels! This is the effect of lowering the noise level from the noise level of a karaoke box (about 90 decibels) to the level of a general household room (about 60 decibels). Effective when you want to use it secretly! If you use this product correctly, it will also have the effect of making it impossible for those around you to know what you are singing, so it is also recommended for those who don't want to be heard! Clean specification! The cover part and the inner sponge part of this product can be removed and washed for clean use. In addition, it has an antibacterial specification that suppresses the growth of bacteria.