The 440 True RMS DMM Scope offers two instruments in one convenient instrument. The 440 provides a familiar digital multi-meter style dial arrangement combined with function enhancing buttons and large scope display. The 1 Mega Hertz scope update rate captures fast changing electrical signals that slower meters can not capture. Auto set-up intuitively formats parameters for common tests. This enables quick and efficient tests to be performed. Test settings can be manually adjusted to the users specific needs as well. The true RMS - root mean square measurement method - ensures accurate measurements when tests are performed on “noisy” or non-sinusoidal signals.