Valcom S-521B Lay-In Ceiling Speaker with Volume Control, 25/70V, 1' x 2'

Valcom ceiling and wall speakers are designed for voice paging, background music and emergency alerts in schools, offices, hospitals and retail spaces. Ceiling models come in round flush-mount and lay-in formats that drop into a standard ceiling grid without extra support bars, while wall models provide directional coverage for hallways and open areas.

Valcom lists the S-521B specifically as: Lay-In Ceiling Speaker with Volume Control, 25/70V, 1' x 2'.