5Pcs DC-DC Step Down Power Supply Adjustable Module With LCD Display With Housing CaseSpecifications:Converter type: DC-DCInput voltage: 5~23V (Best voltage 20V)Output voltage: 0V~16.5V (Continuously adjustable)Peak current: 3AMainboard size: 50mm x 30mm x 12mm(LxWxH)Display module: STN LCDLCD size: 37.5mm x 17.0mm(LxW)LCD accuracy: 1%Conversion efficiency: 95%Load regulation S(I): <= 0.8%Voltage regulation S(U): <= 0.8%Package included:5 x DC-DC step-down power suppl module5 x Transparent shell