The Portable voltages Tester features rapid breakpoint detection ( 1 second response), 12~300V measurement accuracy, and USB rechargeable design with double color LCD screen for clear voltages states alerts through sound / light alarms Perfect for troubleshooting power outages in homes, verifying live wires at construction site, or quickly identifying faulty connection during automotive electrical systems inspections Ideal for electricians, maintenance technicians, and craft enthusiasts needing efficinet voltages measurement tools for household circuits, appliance repairs, or industrial equipment diagnostics Its compact 161mm design weighs just 46g with durability, making this digital voltages tester pen a must have for urgent set and daily toolbelts requiring portable, accuracy voltages detection Equipped with wire identification, continuity testing, and auto data retention, this electrician detector combines a shock resistant ABS body with smart auto shutdown ( 15min) and low battery warnings for professional grades, Manufacturer: ERRORY