The PS16-1 is used to power a single in-wall touchpanel, when a CB-4 connecting block is not used.SpecificationsPower Supplied................................................................+16 VDC, 1.6A, 25WDimensions (L x W x H)................3.7 in (94mm) x 2.2 in (56) x 1.3 in (34mm)Weight........................................................................................10.0oz (290g)Warranty.............................................................................................One Year