... .Non-high-frequency interference ripple. 2.Linear DC power supply 3.Practical 4.Simple interface (The ... is a non-high-frequency interference ripple of linear DC power supply, It is practical, Simple interface, Design ... prevent damage and to facilitate the replacement.AC transformer:50W 3.5-4A. Stable, with high ... are 2 years, exit button, bracket , and power supply will be 1 year . The customers will ...