The Extron MLM 100 AAP™ is a four-gang wall mounting kit with a four single space AAP opening designed for use with the MLC Plus 100 Controller, EBP 100 eBUS® Button Panel, and NBP 100 Network Button Panel. The MLM 100 AAP fits into a wall, Extron SMB Surface Mount Box, or EWB External Wall Box. The kit ships with both black and white faceplates and volume knobs, as well as a mud-ring. The MLC Plus 100, EBP 100, and NBP 100 are sold separately.