There is one very small mark on the side, see photo. The angle adjustment for the mount is accessed by popping out the JBL emblem on the front of the speaker. I'm including an allen wrench for making the adjustments but I prefer using a longer T handle wrench to make adjusting the speaker angle much easier. I'm including the info about this speaker from the JBL site below so you'll have all the specs if needed. These are normally only sold in pairs so if you're in need of a single speaker here's your chance.
Compact Indoor/Outdoor Background/Foreground Speaker
The Control® 25-1 is a two-way 5” speaker with rich sonic character, wide coverage, consistent dispersion, versatile mounting, and a contemporary high-design look that fits into a wide range of decors. This makes Control 25-1 an excellent choice for a wide variety of applications, including retail stores, restaurants, health clubs, theme parks, educational facilities, hospitality, music cafes, leisure venues, and anywhere where a top quality high-output indoor/outdoor foreground/background music (and/or paging) speaker is required.