AC/DC Adapter: AC Input: 100-240V 50/60Hz, DC Output: 3V -24V. Advanced safety technology, complete protection against overvoltage/overcurrent/short circuit/overheating. Multiple Voltage: DC output: 3V-24V, maximum output current 3A. Simply turn the knob to adjust the voltage you want. Wide Range of Uses: This 72W power adapter covers 95% of AC/DC home equipment, as well as 3V-24V household electronics, tablets, scales, routers, speakers, LED strips, CCTV systems, USB charging equipment. , etc. Exactly what you are looking for: affordable, versatile and adjustable adapter, different voltage levels. It is safe to use and convenient to adjust the appropriate voltage.