The CM51 is a high accuracy, current only mini AC clamp meter. This compact clamp is small enough to fit in a shirt pocket and with resolution down to 10 mA is ideal for residential and commercial applications. This low cost auto ranging clamp meter has a jaw diameter of 27 mm and is useful tool for electricians, maintenance teams and installers. The clamp has a useful Data-hold feature to freeze the displayed value when used in difficult to access locations where the display may be difficult to read. There is also an auto power off function and the clamp is supplied with a manual, battery and a soft carry case.