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 wire"s 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. • 5.75L x 0.625DIA.