The UP540W power supply is designed to use household AC power source to power equipments that required DC power. The UP540W converts standard household power 100-240v AC to 12-18v DC power and can supply up to 30 amperes of continuous power. The maximum output current is regulated by the output power of this power supply and does not exceed 30 ampere. Max current = 540w divide by output voltage. 
 
Features: 
Smart cooling fan 
Output voltage adjustable 12-18v DC 
Large LCD indicates voltage and current amperes output 
Two USB ports, 5V 2.1A total for iPad, mobile phone, digital cameras, etc 
One main DC power outputs, up to 30 amperes, two output channels with ON/OFF switch 
Multi-protection: Over loading protection, Short circuit protection, Over temperature protection 

Specifications: 
Brand: Ultra Power 
Input voltage: 100-240V AC 
Input AC frequency: 50-60Hz 
Output voltage: 12-18V DC±0.5V 
Output current: 30A±1A 
Current overload protection: ≤31A 500MS 
Input fuse: 10A fuse 
LCD display: voltage precision ± 0.3V, current precision ± 0.3A 
Output voltage ripple: <150mV 
Power efficiency: 89% 
Power factor: >0.98 
Over temperature protection: <65℃ 
Cooling method: cooling fan 
Opterating temperature: 0-40℃ 
Opterating humidity: 0-90% 
Power cable plug: US, EU, UK optional 
Dimension: 210 * 126 * 60mm 

Package Information: 
Package size: 35 * 17.5 * 9mm / 13.8 * 6.9 * 3.5in 
Package weight: 1883g / 4.15lb 
Brand gift box package 

Package List: 
1 * Ultra Power UP540W Power Supply 
1 * Power Cable (UK Plug) 
1 * English Manual