Mini Portable Oscillograph support the newest firmware V31 Vertical sensitivity:10mV/Div10V/Div (with 1 probe)0.5V/Div10V/Div (with 10 probe) Horizontal sensitivity:1uS/Div10S/Div (1-2-5 Step) Horizontal position:adjustable with indicator Vertical position:Adjustable with indicator Max input voltage:80Vpp (by 1 probe)