Features: Smart Voice Alerts & Real Time responses This socket polarity tester features built in voice prompts to instantly report outlet position and fault , ensuring electrical testing with phase detection, live/neutral wire identification, and leakage checks. Multi Functional & accuracy Engineered Combines ABS durability with high accuracy sensors for accurate diagnostics, integrating polarity verification, leakage detection, and 0 phase analysis into 1 compact tool. general Accessibility Designed for both electricians and homeowners, its 1 touch operate and clear voice guidance simplify complex electrical inspections for all skill levels. Versatile Application Scenarios Ideal for troubleshooting outlets in homes, offices, or workshops, providing stable safety assessments during installations, renovations, or routine maintenance. Enhanced Safety Compliance Meets rigorous electrical standards with hearable warnings for miswired sockets, grounding faults, or electric irregularities, empowering users to address hazards proactively. Specifications: Component : ABS Size: about 60x75mm/2.36x2.77inch Battery: 2xAAA(Not included) Package Includes: 1xPolarity Tester 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.