APLAB’s Distortion & Level Meter Model 2007 are versatile instruments useful for testing audio & communication equipments. Harmonic distortion is one of many types of distortions created in audio and communication equipments. Harmonic related frequencies caused by non linear elements in amplifiers, create a poor distorted signal to the listener. Aplab’s Distortion & Level Meter Model 2007 help to measure the total of this distorted frequency components present in the signal, quickly and very easily in a frequency range of 30Hz to 300KHz. Thus it is used as an ideal test equipment in electronics labs & in production test setup. It can also be used as an AC voltmeter for general purpose voltage & gain measurements over a wide range of level & frequency.