Features: Adopting high-precisions induction technology, it supports voltage measurement of 11V-450V with accuracy of ± (1%+2), ensuring fast identification of voltage and improving the maintenance efficiency of professional electricians and home users. In addition to conventional voltage detection, it also have on-off testing and phase detection functions, which can meet various needs with one tool, suitable for professional electricians and maintenance personnel, and reduce the number of tool carried. The high torques screwdriver function easily handles various fastening and dismantling tasks, providing users with additional practicality and solve problems that require multiple tool. It have overvoltage protection and short circuit alarm functions, effectively reducing usage risks and ensuring safe operation for users in high voltage environments, especially suitable for novice electricians and home users. The high-definition LCD digital display screen displays voltage values and torques data in real time, avoiding misoperation and improving work efficiency. Suitable for daily carrying and easy to use in various scenarios. Specifications: Component:ABS Color:Red,Yellow Size:Approx.190mm/7.48''x 33.5mm/1.32'' Screwdriver: Slotted Batch Head, Crossed Batch Head Package Includes: 1Piece Electrical Tester 1Piece Manual 1Piece Battery note: Please allow 1mm errors due to manual measurement. Due to the differences between different monitors, the picture may not reflect the actual color of the item.