4 Digits Display LW-3010KDS 30V/10A LED Adjustable Switch DC Regulated Power Supply Multi-Function Protection Test Power Supply  Features: This is a regulated DC power supply which you can adjust current and voltage continuously. 4 digit LED display of voltage and current, high precision. Long handles for easy access. Adopt PCB board, patch technology, longer power supply life and high efficiency. Energy-saving and efficiency: over 80% power, 40% higher than other liner power supplies. Intelligent temperature control: adjustable 8cm fan revolving speed based on load power, noise reduced and life prolonged. Safe and reliable: overload protection, overheating protection, overvoltage protection, short-circuit protection, etc. Input voltage is switchable (AC110V/AC220V) through the switch on the back of the instrument. Can be used in the electronic circuit such as the operational amplifier, digital logic circuit and so on. Suitable for electron fans, research people and the professional people. It can be widely used in production line test, electrical maintenance, aging products, battery charging, laboratories, scientific research and teaching and many other areas. Using advanced technology, it effectively reduces the weight of the power supply and facilitates power supply movement. Parameters: Input voltage: single-phase 220V±10% 50Hz ±2Hz Output voltage: 0-30V Output current: 0-10A Input Voltage: AC110V/220V ±10% Display Accuracy: ±1%±1 digit Frequency Range: 50/60Hz Ripple: <=10mVrms Voltage stabilization: ≤0.05%+1mV Current stabilization: ≤0.1%+10mA Load stabilization: CV≤0.1%+1mV CC≤0.1%+10mA Ripples and noises: CV≤10mV(rms) CC≤20mA(rms) Working conditions: -10C -40C relative humidity :< 90% Storage conditions: -20C-80C relative humidity :< 80% Dimension: 280*128*145(mm) Weight: 2400g Note: Item color may show sight aberration due to different shooting light and monitor display. Packing list: 1* DC Power Supply 1* Power Line 1* User Manual