Yes, your Beosound A1 3rd Gen can be used outdoors as it is IP67 certified.
IP67 certification means that the product is certified to be resistant to submersion in water up to 1 meter in depth for up to 30 minutes.
Note that the certification covers freshwater testing only and not salty or ionized water. IP67 certification guarantees that the product’s inner structures remain intact but it does not guarantee that the product’s appearance will remain unaffected. Click here for more information about IP certification.