Input & Output -- Input: AC 100~240V, 50/60Hz ; Output: DC 9~24V Adjustable, Max 3A 72W ; It can supply with any voltage of indoor electronics between 9~12V, such as 9V 10V 11V 12V 13V 14V 15V 19V 20V 24V ,etc and any amp less than 3A. Please choose correct voltage before plug it to your device. Wrong voltage may damage your device Plug Design -- Fit for both 5.5x2.5mm & 5.5x2.1mm plug. This cable terminates with a "standard" 5.5mm OD, 2.5mm ID DC plug, but it's also compatible with DC 5.5x2.1mm socket with the inner center spring contact. (NOTE: Power Supply Polarity: Center or Tip is positive (+), Sleeve is negative(-) Real-time LED Volt Display Function -- Easy to use with the switch knob. Also you can control and monitor the power supply output voltage and from virtually with the LED display. LCD display will show the output voltage, in case that wrong voltage regulation damage your device Built-in Power Supply Protection-- Certified by UL, it ensures safe use with over voltage, over current, and over temperature protection to keep all of your mobile devices safe from unexpected surges and spikes. Wide voltage range from 100V to 240V makes it suitable for travel Wide Range of Applications -- The 72W all-in-one multipurpose AC/DC adapter fit for many 9~24V small household electronics such as LED strips, under-cabinet light, TV Box, smart speaks, wireless routers, essential oil diffuser humidifier, USB fan, Wifi camera, USB Hub, hard disk box, DC motor, DC pump, digital photo frame, DVR NVR surveillance system etc.For indoor use only Parameter Input Voltage: AC 100V~240V 50/60Hz Output Voltage: DC 9V~24V Adjustable Output Current / Wattage: 3A, 72W Max Output DC Plug: 5.5mm x 2.5mm also compatible with 5.5mm x 2.1mm (inside "+", outside "-") Total Length: 192cm / 6.3ft Working Temperature: 0 - 40℃ Storage Temperature: -20 - 60℃ Package Included: 1PCS x AC/DC 9-24V 3A Adjustable Voltage Power Adapter (US Plug)