QualArc FTC-1224Q Optional Hardwire Transformer for Edgewood Plaques Low Voltage hard-wire transformer output of 18 V AC 10 VA and input 120V AC 60Hz Qualarc lighted address Plaques are designed to attach to and get their power from an existing low-voltage doorbell system However, you may wish to locate your lighted plaque in an area that does not have access to your doorbell In that case you will need to purchase and install a transformer. Two models are available: fps-2018 plug-in transformer and JBX-15951 hard-wire transformer Size: 2' x 2' x 2' 1 lbs Low Voltage Transformer For use with Edgewood Lighted Plaques