Brand Aiphone
System Type Adapter
Model Aiphone PS-1820
MPN PS-1820

Check the listing for details. Aiphone Intercom PS-1820 18 Volt DC 2 Amp Power Adapter Supply. Condition: Used. Listed at 29.99 USD. I have 3 of these available. They also come with the power cord(not pictured)

$20.99
$29.99