... preset time, step control. 2011---HC series Expert Timer for Electrical life test(Laboratory)HH8 series, 48*96*80mm,single line 4 digits ... displayHH4series, 48*48*80mm,dual line 4 digits displayHH8 series, 48*96*80mm,dual line 6 digits displayHigh precision,Simple ... pause,reset,start by powering on or by extra terminal.Switch/pulse or level controng timng,etc.. Products available: Timing control ...