oscilloscope
electronic device black or grey a large, rectangular display one or more knobs to control settings one or more buttons to control functions a power cord input ports for connecting to other devices a probe for testing circuit signals
oscilloscope which has electronic device oscilloscope which has black or grey oscilloscope which is a large, rectangular display oscilloscope which has one or more knobs to control settings oscilloscope which has one or more buttons to control functions oscilloscope which is a power cord oscilloscope which has input ports for connecting to other devices oscilloscope which is a probe for testing circuit signals