With thrumbwheel adjust key,Pocket-sized digital storage oscilloscope meets basic electronic engineering requirements. Dual trace three lines, new kind of system interface, capacitive convenient operation. You can easily operate it with the gestures of one-click, double-click, press and slide. The aluminum shell is very fashionable equipped with 320*240 color display, 8M Memory card (USB flash disk), and chargeable Lithium batteries. The thickness is about 11 mm/ 0.43 inch only! The volume is small enough to take it anywhere. It can meet the demands in many fields, such as, school experiments, electronic repairing, and electric engineering.