Amprobe RS-3 PRO [3467465] 600V AC / 300A AC Analog Clamp Meter with Resistance and Continuity, CAT IV Rated.The Amprobe RS-3 PRO analog clamp is a great tool for tough electrical applications. The RS3PRO works well in extreme temperatures from 32°F to 122°F, while digital clamp LCD screens tend to freeze this anolog clamp measures up to the test. The Amprobe RS-3 PRO measures AC current up to 300A, voltage to 600 VAC, resistance, and continuity. Other Features of the analog clamp include pointer lock, data hold, operates on 50 and 60 Hz frequency and the meter is CAT IV, 600 V Safety Rated. The RS-3 PRO does not require batteries for measuring Amps and Volts and shows measurement with an easy-to-read rotary scale.