• Capacitive measuring method
• Warning tone (Testboy 11, 111)
• LED flashlight (Testboy 111)
• CAT III 1000 V

The non-contact voltage testers Testboy 10, 11 and 111 detect live conductors on cable connections, cable reels, sockets, switches, junction boxes, etc. Thanks to the capacitive measuring method, they do not require a current flow and can indicate interruptions quickly and with centimeter accuracy.