CLEAN POWER - Provides a stable 12V AC power supply, ensuring your Rolls and Bellari devices operate without unwanted noise or interference for pristine audio quality. VERSATILE VOLTAGE - Specifically designed to deliver the correct voltage for Rolls and Bellari portable tube microphone and phono preamps, guaranteeing optimal performance. COMPACT DESIGN - The Rolls PS12 boasts a small footprint, making it easy to integrate into any setup without taking up valuable space, perfect for both studio and on-the-go use. EASY SETUP - With its standard 2.1mm x 5.5mm plug size, the PS12 AC adapter connects effortlessly to compatible Rolls and Bellari devices for immediate use.