PAGE CONTROLS, 3-ZONE W/ POWER & TONE GENERATOR: Accepts Pulse Dial and Tone Dial, Background Music Input, Automatically Mutes In Zone Being Paged, Features Are Programmable Per Zone, Built-In Tone Generator, Plus 3 Group Zones (V-2006A Only) For Night Ring, Time Clock Tone, Door Bell, Page Override for Special or Priority Announcements, Battery Back-Up Input (VPB-260), Power Built-In, UL Listed; ACCESS: Page Port on Selected Telephone Systems, PBX Loop Start or Ground-Start Trunk Port, Electronic or 1A2 Line Key (line card required), or Dedicated Single Line Phone Set; Specifications: Input Impedance: 600 ohm; Music Source Impedance: 4 to 600 ohm; Music Input Level: -10 dBm nominal; DC Output: -24 Vdc @ 1.5A; Power Requirements: 230 Vac/.1A or 120 Vac/2A, V-2003A; Shipping Weight: 6.0 lbs; Dimensions: 7.15" H x 10.0" W x 3.0" D(18.16 cm x 25.4 cm x 7.62 cm