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Product Features: 1. Portable size, practical and convenient to operate 2. Auto shift between voltage stabilization and current stabilization 3. It has rather low ripple voltage 4. LED screen displays output voltage and current 5. Selectable over-current protection, widely applied to daily fields 6. Adjustable design could meet your various demands 7. With 4pcs potentiometers, respectively for output voltage and output current 8. High precision and stability Product Description: DC Power Supply 1. Model: QW-MS305D 2. Rate Output: 0~30V,0~5A 3. Dimensions: (10.15 x 4.96 x 6.18)" / (25.8 x 12.6 x 15.7)cm(L x W x H) 4. Weight: 65.05oz / 1844g 5. Display: 3 LED Display 6. Adjustable: Yes 7. Plug: U.S Standard Rate Operating Condition 1.Input Voltage: 220V±10%,47~63Hz / 110V±10%,47~63Hz 2. Working Conditions: -10℃~40℃ 3. Storage Conditions: -20℃~80℃25.8 4. Working Relative Humidity: <80% 5. Storage Relative Humidity: <80%25.8 Output Technical Parameters 1. Power Effection: CV≤0.05%+1mV,CC≤0.05%+10mA 2. Load Effection: CV≤0.1%+5mV,CC≤0.1%+10mA 3. Ripples & Noises: CV≤10mV(RMS),CC≤20mA(RMS) Package Includes: 1 x DC Power Supply 1 x Power Line 2 x Test Line 1 x User Manual