NOTICE: This power supply can not switch between ac and dc. To avoid burning out the dc power supply, please switch the input to 110V first! Do not operate in humid environment Do not operate in flammable and explosive environment Keep the product surface clean and dry Operating conditions: Dual Input voltage: AC 110V/220V10% (switch selection 115V in United States), 50Hz/60Hz Operating environment: 32 - 104°F (0 - 40°C), and humidity: â?¤80% Storage environment: temperature: 14°F-158°F(-10°C~70°C), and humidity: â?¤80% Parameters: Model :STP3005 Input voltage :110V/220VAC±10% Switchable Output: DC 0~30V,0~5A Display resolution: voltage: 0.1V, current 0.01A Load regulation: â?¤0.3%+5mV Ripple&Noise: â?¤80mV Altitude:â?¤2000m Pollution Degree: 2 Dimensions: 226(L) *82(W) *138 (H) mm Net weight: 1.5kg(3.3lb) What You Get: 1x DC Power supply host 1x Output power cord 1x US Power Cord 1x User Manual