Features: It can be used in the electronic circuit such as the operational amplifier, digital logic circuit and so on. Energy-saving and efficiency, over 80% power, 40% higher than other liner power supplies on market. Intelligent temperature control, adjustable fan revolving speed based on load power, noise reduced and life prolonged. Quick reaction, microsecond load, fast reaction. Specifications: Model: STP3005H Frequency range: 50/60Hz Load Regulation: ≤0.3%+5mV Ripple: ≤5mVrms Current Display Accuracy: LED 1%2 byte Operating Temperature: 0℃~ +40℃ Storage Temperature: -10℃~ +70℃ Storage and Operating Humidity:≤80%RH Altitude: ≤2000m Pollution Degree: 2 Size: 215x85x130mm/8.5x3.3x5.1" Front Panel: (1) Model of Sky top power (4) Current meter: display the output current value (5) Current indicator (7) Output current course and fine knob (8) Output "+" and "-" terminal (9) Power switch: control the power (10) Ground (Earth terminal) Operations: (2) The limiting value of the output current is 5A (but it is different with the models), you must disconnect the power immediately when it is over load (the over load indicator (5) is on). (3) Setting of current limiting Make sure the maximum safe current of outside load. Use a short-circuit wire to short the current terminals (+) to (-). Adjust the current knob to till the CC indicator on. Adjust the current knob to the desired ampere. After setting the current value cover load protection. Then do not change the current control knob. Take off the short circuit wire. It is standby status now. (4) The equipment is used in a manner not specified by the manufacture; the protection provided by the equipment may be impaired. Safety and Maintenance: You should keep this unit in the dry and good ventilation place after using. Disconnect the power cord if you don't use it for a long time. Do not put device on moist or wet background. The device is designed for indoor use only. Do not turn out for any extreme temperatures of direct solar radiation or extreme humidity or wetness. Replace defect fuse only with the original value fuse, please avoid short circuit of fuse and holder. The fuse is located on the rear panel adjacent to the power cord receptacle. Please take care of good temperature ventilation. Do not block the ventilation holes in the rear and side panel, as this will increase the internal temperature. Please keep the device out of children. Do not put any liquid near of the unit to avoid short circuit. Do not place the system near of strong magnetic fields. Before operation the system must be temperature stabilized to avoid humidity. Opening of the system and service is only allowed qualified service personal. Package Includes: 1 x Power Supply .