... humidity test and low voltage test.Features: 1. This power supply has 3 items, including BV-12-FYS-100W, BV- ... performance, reliabilty, cost, capacity and adaptabilty to harsh working environment.Why you need this power supply: 1. In advertising sign industry, The ... maintenance, especially in the very high buildings.2. Our power supply will provide stable adaptability in the outdoor bad environment, 3 ...