... *Attractive price Features: * Six high speed operation modes: CC, CR, CV, CW, CC+CV, ... , over voltage, over power, over heat, polarity reversed protection * High-luminance VFD screen with two lines& four channels display * Intellegent ... * Communication mode: RS232/RS485/USB. Application: Production line(cell phone charger, cell phone battery, electric vehicle battery, switching power supplier, linear ...