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Power supply unit for the safe power supply of experimental devices that require 3 V DC for operation (diode lasers, digital scales, etc.); Technical data:Output voltage: 3.3 V DC/300 mA (with cable and hollow plug 5.5/2.5 mm)Supply voltage: 100 ... 240 V AC / 50 ... 60 HzDimensions: approx. 59 x 40(78) x 25 mm (without plug unit)Mass: approx. 61 g