The P2 Ultra-compact personal In-ear Monitor amplifier was designed specifically for you. A convenient hard-wired personal in-ear control center. The P2's belt pack puts monitor control right at your fingertips, plus it's powerful, lightweight and ultra-easy to use. P2's internal mono/stereo switch lets you choose the mode that best fits your needs. When using your mixer’s aux send or any other mono source, move the switch to the mono position. For connecting to a headphone output or other stereo source, simply set the switch to stereo and use an XLR-to-TRS or TRS-to-TRS (male to male) cable.