1.input voltage range: AC100-240V. 2.input voltage frequency: 47-63Hz. 3.output voltage: 5V. 4.output voltage transfer rate: 5%. 5.rated output current: 3.1A (foot safety flow) 6.current output range: 0-3.1A 7.Output Ripple & noise: 80mVp-p. 8.working efficiency: 75-80%. 9.output short circuit protection. 10.overheat protection. 11. working temperature: 0 ~+50'C. 12.storage temperature: -20 ~+85'C. 13. humidity: 10%-95%RH" Dimensions: 2.87 in x 2.36 in x 0.91 in (7.3 cm x 6.0 cm x 2.3 cm) Weight: 1.80 oz (51 g)