Tekpower TP3644A Programmable & Variable High-Precision DC Power Supply 0-18V @ 0-5A with USB Connection by Tekpower, with Software CD with Mountable Rack Numerical keypad with direct input and rotary knob adjustment Constant voltage & constant current mode Low output ripple & noise Power MS Power Management System software, ActiveX and DLL tools, Support VB, VC++, DELPHI, LABVIEW One year warranty with cablibration certificate