... is a non-high-frequency interference ripple of linear DC power supply, It is practical, Simple interface, Design features such as ... : 0~30sec.Aptional Accessories: Backcup Battery, 12V/7HStandard Designe: Steel material, PaintedFuse: 10A. Short circuit protection to prevent damage and ... electric strike are 2 years, exit button, bracket , and power supply will be 1 year . The customers will be in charge ...