ushirou is a user on kamiyacho.net. You can follow them or interact with them if you have an account anywhere in the fediverse. If you don't, you can sign up here.
良さげ（ギター持ってないけど）
BOSS - WAZA-AIR | Wireless Personal Guitar Amplification System https://www.boss.info/jp/products/waza-air/
@masaka これポチりそうになりました危なかった