Security performance and versatility are the features that set this multimeter apart from others the dm 860a offers maximum security with its classification in the overvoltage category iv up to 1000 v it boasts standard features such as beep jack and audible and visual alarm that prevents faulty test lead connections and blown fuses that can damage the meter the dm 860a offers brilliant performance too true rms ac dc measurements are made with high accuracy and shown on the 50 000 cou