... is a non-high-frequency interference ripple of linear DC power supply, It is practical, Simple interface, Design features such ... transformer:50W 3.5-4A. Stable, with high efficiency.Suitable For : Access control, Electric lockWeight: 2.9kgStandard Packing: 8pcs.Except ... services, Access Control Panel ,electric bolt and electric strike are 2 years, exit button, bracket , and power supply will be 1 year . ...