The model MD305 is built for rugged - ness, versatility and ease of use. It is designed with a unique hook-shaped jaw that enables the user to "pry" into or "hook" onto cables (will accept 2 x 500MCM) or even smaller bus bars. The model MD305 measures up to 600A. It works as a traditional current transformer (with ratios of 100:1 or 1000:1) and provides current outputs (mA) for use on DMMs, recorders or instruments with current ranges. The model MD305 uses hall effect technology and measure to 1000ADC and 700AAC. The electronics and batteries are self-contained in the handles. The output of AC probes is 1mV/A. Unique hook-shaped jaws that enable the user to "pry" into or "hook" onto cables. Maximum conductor size is 2 x 500MCM, works as a traditional current transformer with ratio of 1000:1. Double insulation. CE mark. Applications: electric utility, field testing, HVAC, industrial maintenance, laboratory, plant maintenance. 600A Nominal range. 1 to 700A Measurement range. 1000:1 Transformation ratio. 1mA/AAC/AAC Output signal. Overload: 700A for 10 min. 48 to 1000Hz Frequency range. 600Vrms Working/Common mode voltage. 5' Lead output termination. Operating temperature: -5 degree to 122 degree F. Storage temperature: -40 degree to 185 degree F. 1.3" Jaw opening. Dimensions: 2-19/32" width by 7-87/128" height by 1-43/128" depth. Weight 14.82oz.