Description Product Reviews Valcoms power supplies are engineered for 20 year life cycle for normal paging systems. Our power supplies meet federal and state energy requirement including Energy Star Rating. Barrel or Wire Connection Easy installation. UL Certified Product Meets or exceeds industry standard. 24 VDC, Switching, Digital, Filtered (UL, CSA, CE) +80 Valcom Power Units Valcom Power Units Every Valcom product is marked with either a positive, negative or neutral power unit. Simply add up the negative power units and then purchase a power supply with a greater value than the total power consumption of the system. If you have extra power units you can add speakers to the system at a later date, extra power is OK lower power will cause a performance problem on your paging system. One Valcom power unit = 50 mA, -24 Vdc 0 Reviews Hide Reviews Product Reviews