High Precisions Testing features live wire detections with 100 500V measurement ranges, ensuring electrical work in various environments Powerful utilizes premium steel construction to deliver strong twisting force for different screw types in electrical and household applications Insulated Housing provides wear resistant casing that enables fast Voltages detections while maintaining user during electrical testing tasks Quick Switches Convenience includes crossed / slotted double end bit design for effortless mode switching, enhancing work efficiency during electrical repairs and installations Double Function Design combines screwdriver bits and Voltages tester, eliminating the need for multiple tools and saving storage space for electricians and DIYers, Manufacturer: Oxxggkao