KNACRO AC Switching Power Supply Adapter DC 9V 5A 5000ma 45W Power Supply Adapter AC 100v-240v Transformers Interface 5.5x2.5mm AC-DC Using high-quality components and circuit boards, 100% after 24 hours of aging, stable performance. With overload overvoltage overheating short circuit protection, multi-filter with magnetic interference. The direct current ripple is small, and the work efficiency is high. Low operating temperature and long service life. Good insulation performance, high resistance to electrical strength.