- 1 Zone one-way page control enhanced- Enhanced: Phantom zone allows paging to all speakers but limits music to selected speakers- Built-in single and warble tone generator- Background music input with voice operated mute- Page override for special priority announcements- Battery back-up input - Built-in power - UL listed- Access: page port, PBX loop-start trunk port, electronic or 1A2 line key (line card required), or dedicated single line phone set- Input impedance: 600 ohm- Music source impedance: 4 to 600 ohm- Music input level: -10dBm nominal- DC output: -24 Vdc @ 1A- Power requirements: 230 Vac/.5A-Weight: 5.3lbs- Dimensions: 7.01"H x 9"W x 2.4"D- VALCOM POWER UNITS (+20)