model:SCAC2004, it is a switching-mode power supply, use for LAPTOP and LCD MONITOR, 

 input :AC voltage 100V to 230V 

output: DC 12V/15V/4.0A  16V/18V/19V/20V3.5A 24V2.9A

Protection:with Overload protectionShort Circuit protection ,

Apply:use for LAPTOP and LCD MONITOR, power supply by mains supply.  

Rated Input Voltage:AC 12OV OR AC 230V

Vibration Input Voltage Range:AC100V-260V

 Input Rated Current:1.0Amp              Input Min. Current:0.1A

Input Power:100W                               Efficiency:>80%

(TYP) Output voltage:12V/15V/16V/18V/19V/20V/24V(-0.2/+0.8V NO LOAD):DC12V-24VOutput voltage:12V/15V/16V/18V/19V/20V/24V(-0.9/+0.8 V@rating load)Output current: 12V/15V/4.0A 16V/18V/19V/20V3.5A  24V2.9A:DC12V-24V4.0AMP(max)

Overload protection:yes                     Short Circuit Protection:yes 

Line Regulation:+/-5%                        Load Regulation:+/-5%