- Valcom loud warble horn- External audible signal device- 90 Vac ring 18 Vac buzzer voltage activation- Connects directly to PBX or station lines- Built-in tonegenerator 5 Watt amplifier and volume control- Dimensions: 6.5 H x 8.2 W x 10.4 D- Weight: 4.7lbs- VALCOM POWER UNITS: (-10)- Beige