Product Description Rugged Solid State electronic voltage detector. Needs no wire or clip connector to ground. Safe around automotive micro-comuters.Simple to Use:- Hold tester in one hand and place other hand on bare metal (grounded) part of vehicle.- Place the tester point onto connector or through insulation of wire to be tested.- The 8002 will light, sound and vibrate when positive voltage (hot wire) is detected.- V-Groove needle accessory prevents the tester point from side-slipping when piercing wires insulation, and can be removed for testing hard to reach places.Technical Specifications:- No ground wire or clip required.- 1Ohms minimum input impedance, current draw of 20 microamps at 24 volts.- Operates on DC voltages between 3 and 28 volts.- Light, buzzer and vibration indicator.- Stainless steel construction.- Long life size "N" alkaline batteries included. Duracell type MN9100.- Solid State lamp for lifetime lasting performance.- 5.75"L x 0.625"DIA.