Amprobe AMP-25 TRMS Mini Clamp Meter Pocket Size is a new pocket-size multimeter that is the height of a pen, making an ideal TRMS measuring solution for AC/DC electrical spot checking. The Amprobe AMP-25 measures AC/DC current to 300A, includes inrush current and low pass filtering, as well as non-contact voltage detection and a backlit LCD display screen.