The IER-2 is a chime extension speaker from Aiphone which is specially designed to hear the chime tone from a door station when located in a separate area without the need for a separate handset. The IER-2 chime extension speaker is capable of mounting into a single gang box, plus comes with 3 position switches which are used for volume control. This chime extension speaker is easy to use, and comes affordable to help save money.
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