EL302P - 60W, Linear, RS-232

  Single output linear, 0 to 30V at 0 to 2A
  Full remote control and readback using opto-isolated RS-232 interface
  Local operation via three rotary encoders 
  Independent digital voltage and current meters 
  Constant voltage or constant current operation
  DC output switch, automatic mode indication
  Compact lightweight design 
  Low Cost 

EL302P-USB

  As EL302P but with USB interface in place of RS-232