Martindale-VT3-Non-Contact-Voltage-&-Magnetic-Field-Indicator-Martindale-MARVT3-P-The-Martindale-VT3-combines-a-non-contact-voltage-detector-with-a-magnetic-field-indicator-Suitable-for-detection-of-AC-voltages-in-walls-sockets-cables-circuit-breakers-&-more-With-a-detection-range-of-200V-1000V-this-is-a-handy-tool-for-any-electrician-fitting-comfortably-into-your-pocket-with-the-aid-of-a-clip-P-P-The-VT3-is-simple-to-use-&-features-a-red-light-in-the-tip-which-illuminate