Comnet VBB-3ALS 3 Amps at 12VDC or 1.5 Amps at 24VDC selectable output; heavy duty self contained dual voltage switching

"Supervised power supply/charger module for the VLB/VBB Reader Controller or for 24 VDC peripheral devices such as VBB-RI reader interfaces. Designed for hardwire installations (not a plug-in device); 90-250 VAC Input. Enclosure Dimensions: 14in. x 8.5in. x 3.50in. . Supplied with two 12 VDC 7AH batteries. UL 294 Listed."