ATW PC-300 12 - 24 VDC Multi-Tone Electronic Chime Three different tones: single tone chime, dual tone chime, and fading tone chime Any combination of the three tones may be used Includes high-low volume control Mounts into a single gang box Operating voltage: 12 - 24 VDCSound output: 80 - 88 dB @ 12 - 24 VDCCurrent draw: 70 - 180 mA @ 12 - 24 VDCDimensions: 4.6 x 3 x 1.5Color: WhiteMaterial: ABS plasticWiring: Positive, common, and three positive triggers