&amp;lt;p&amp;gt;&amp;lt;span style=&amp;quot;font-size: x-small; color: #000000;&amp;quot;&amp;gt;EnergyStar certified with DC motor technology Green and amber LED indicator lights show low and high speed modes. Noise level at a quiet .5 (low) or 1 (high) sones Best price/peformance bathroom fan on the market Detachable 4&amp;quot; diameter duct connector Lightweight design for easy installation and lower vibration Impeller includes 67 fins to reduce noise output Soft start control reduces current impulse and start-up noise Consumes only 7.7 watts on low speed Ceiling mount only&amp;lt;/span&amp;gt;&amp;lt;/p&amp;gt;