... 2.Linear DC power supply 3.Practical 4.Simple interface (The device is a non-high-frequency interference ripple of ... linear DC power supply, It is practical, Simple interface, Design features such as stability, performance, A power status ... with high efficiency.Suitable For : Access control, Electric lockWeight: 2.9kgStandard Packing: 8pcs.Except for human activities For the non-human factors of ...