-The 3.5mm jack is a 90 degrees fitting, but it does not have a stand off making it impossible/impractical to use with most phone cases for rehearsal / practice off stage.-the case that is supplied is basically a vinyl bag that doesn’t really secure or pad the earbuds at all. completely garbage again.
https://www.amazon.com/Sennheiser-IE-40-dynamic-monitors/dp/B07FBBV6Y8