Haitronic DC 30V 5A Adjustable Switching DC Power Supply, AC 110V Input, Precise Variable DC 0~30V @ 0~5A Output, 3 Digital Display with Alligator Cable and Power Cord for Phone & Laptop Repair DC output 30V 5A power supply unit! Science investigation, inventor, Maker, students DIY experiments, factory, electronic appliance maintenance/ repair etc. Reliable! can switching from 220V/110V to DC0V~30V, single channel output, 0~5A adjustable accuracy, dual LED 3 digit display. continuously adjustable within the rated AC 220V/110V to DC30V~0V. CV/CC working pattern switching automatically. Built-in FUSE! Full protecting makes you safe to use: over-load protection function, overheated protection function, short circuit protection function. long lifetime upto 5-8 years, Slim body but full featured! easy to handling, a sturdy case, novel appearance, good performance, excellent cost effectiveness.