Self contained audio masking system (1 channel, 1 zone) for small projects, up to 20 remote speakers can be powered (M1000, M2000LP or M2000SM), compact enclosure, includes (2) 2" x 4" internal speakers, 12W x 2 channel Class D amplifier, 12W 70V amp output, selectable white and pink noise analog generators, variable hi cut filter, external UL rated 24 VDC power supply, 4 mounting holes, 2 removable hanger handles for suspended mounting, UL2043 suitable for use in air handling spaces, 7. 25"W x 2. 7"H x 6"D.