Features: Ensures safety of electrical equipment with Handheld Three Phase Power Sequences Meter, tool for precise phase Sequences measurement. This device features simple operations and high accuracy, quickly verifying the correct phase Sequences to prevent potential damage. for electricians, maintenance personnel, and engineers who regularly inspect and troubleshoot electrical systems. This phase Sequences meter for use in homes, factories, site, and for installing or servicing various three phase power equipment like motors, air conditioners, and generators. Constructed from ABS, our phase Sequences meter stands up to the rigors of daily use, ensuring performances when you need it most. Specifications: Materials: ABS Size:80x29x23mm Package Includes: 1Set 3 Phase Rotation Tester note: Need No7 dry battery, the packaging not include the battery!!! Please allow 1-3mm error due to manual measurement. make sure you not mind before bid. Due to the differences between different monitors, the picture may not reflect the actual of the item.