The lrp 1205 from voltcraft is a portable 100w variable dc switched mode power supply with an 85 efficiency rating with adjustable voltage 04 20vdc and current 0 5a it offers ovp over voltage protection to protect sensitive consumers low residual ripple and automatic switching between constant voltage and constant current modes a backlit lcd display which remains on whether output is live or not displays v and i weighing just 2kg with dimensions at 70x150x250 mm and a carrying handle