The RDS21021I Wave Rambler PC Oscilloscope has a pen type design with easy portability. Special metal material made probe-tip assures durable lifetime and less touch Pressure from U-shape curved surface.|Creative USB isolation function fulfills direct device- powering via USB port, and supports floating measurement (isolation voltage upto 1000V), making the operation more user-friendly, assuring safer T&M environment, and decreasing the interference to micro signal- measuring to the minimum.