Features: Clamp ammeters referred to as clamp meter. The work is-mainly composed of an electromagnetic current meter and bushing type current mutual inductor. Straight through current transformer-core made of movable opening, and a clamp on ammeter. The utility model relates-to a portable instrument which can directly measure the AC current of a circuit without disconnecting the circuit. Can measure AC/DC voltage, AC current, resistance-and test continuity. Manual select measurement function and range. Overload-protection for the whole measurement range. LCD display with backlight, convenient to operate and read. Data hold function, low battery indication, auto power off. Suitable for electrical equipment testing and maintenance. Specifications: Material:ABS Size:Approx.14.9x6.55x3.05cm/5.86x2.57x1.2inch Color:Red/Blue/Yellow Display: digital display. Measuring current range: 20 (A) Measuring-resistance range: 200K (Ω) Package Includes: 1x Digital Clamp Multimeter note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thanks for your understandings.