| * | Bypass feature allows emergency announcements to be heard at highest level even if local speaker volume is set low or off |
| * | Adjusts loudspeaker output levels on 25V and 70V systems |
| * | 2 models control up to 10-watt or 35-watt speaker systems |
| * | 10 attenuation steps and an off setting |
| * | Mounts in standard electrical box |
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