The volume can be set by the dealer using their Techstream computer to customize the setting for Wireless Door Lock.. It is labelled: "Wireless Buzzer Vol". There are 7 levels of volume available (0 - 7). The default setting is level 7, the highest setting. I assume "0" is similar to "off". The Buzzer can be turned On or Off as well using Wireless Buzzer Resp.
Hope that helps -TM-