P4 uses XLR / TRS combo input connectors with locking mechanism to prevent XLR cables from accidentally disconnecting. It also supports stereo / mono switching to meet different monitoring needsP4 only needs two AAA batteries (included) to run for 12 hours. It also has battery control and LED indicator to let you know the battery status at any time. It also comes with a 3.5 mm (1/8inch) stereo output jack that fits your favorite headphones and earplugs