I purchased this about six months ago, but I haven't had much opportunity to use it, so I'm selling it. ^_^ You can adjust the volume to your liking by installing an app on your phone! Manufacturer's website: https://www.victor.jp/voicereceiver/lineup/eh-w10/ I could only find the instructions for 2. Please understand that this is a used item before purchasing. Please check the photos for the condition. m(_ _)m The cables are unused!