Price reduced from 10500 to 2222. This is a junction box made by Doctor Music in Aichi Prefecture. → https://www.doctormusic.co.jp/ It cost about 10,000 yen. Operation confirmed. It may look like a simple junction box, but it actually has a very convenient function! You connect your wireless system to the ATW IN, but there's also an input jack on the outside. When you plug a shielded cable into this jack, the wireless input is cut off, and it automatically switches to the shielded input! This is the perfect junction box for people who use wireless for live performances but want to use a shielded cable at home! It's passive, so no power is required, and the size is 112 x 60 x 31mm in an unpainted enclosure! MXR size.