Features: The instrument is check the phase Sequences,and at the same time it have LEDs to show you if the phase is open and not. Easily involve the terminals of the control panel to be tested,guaranteeing reliability and safety. It can check a large ranges of 60V-600V three-phase. The instrument guaranteeing high reliances and performances. Small, light and portable. 3 Phase Sequences Presences Rotation Tester ensures accurate detection of phase Sequences and open phases, providing critical insight for electrical safety and system stability. Specifications: Component:ABS Ammeter display screen: Approx.82x62x23mm/3.23x2.44x0.90inch Bag: Approx.160x100mm/6.3x3.94inch Package box: Approx.170x110x48mm/6.69x4.33x1.89inch Package Includes: 1 Set Rotation Tester note: 1.Please allow 1-2cm errors due to manual measurement, making sure that you not mind before order. 2.Due to the differences between different monitors, the picture may not reflect the actual of the item.