Input: AC 100~240V, 50/60Hz ; Output: DC 9~36V Adjustable, Max 4A 144W ; It can supply with any voltage between 9~36V,such as 36V 30V 24V 20V 19V 14V 12V 9V, etc and any amp less than 4A, such as 500mA,1A, 1.5A, 2A, 2.5A, 3A,3.5A,4A. LCD display will show the output voltage, in case that wrong voltage regulation damage your device. Based on hundreds of users feedback, we have made the following improvements: 1. The knob can be adjusted more evenly, and it can reach 22V ~ 23V by rotating 50%. 2. Increase the off gear to turn off the power without pulling the plug. 3.Add a polarity converter cable, which make it compatible with more devicesdoubles its range of application. It comes with an original 5.5x2.5mm tip and 14pcs frequently used tips: 6.5x4.4mm+Pin, 5.5x2.1mm, 5.5x3.0mm+Pin, 5.0x2.5mm, 6.3x3.0mm, 5.5x1.7mm, 4.8x1.7mm, 4.0x1.7mm, 3.5x1.35mm, 3.0x1.1mm, 2.5x0.7mm, Micro-USB, Type-C and DC terminal