Specification:Model: GK6AAlarm:Vibration and red light Measuring Range:100~1000VAC,at 50/60Hz Waterproof & Dustproof: IP45 Battery: 2* 1.5V battery (NOT included)Size: 152 * 32mm / 6 * 1.3in Features: This unit is a portable AC voltage detector, which can be used to check whether a cable or a socket is live. Accurately detects AC voltage ranging from 100 to 1000V, distinguishing the voltage with LED light and vibration. Durable ABS plastic resin ensures a compact build and its pocket clip allows easy carry. High efficient. You don't have to call a professional electrician nor make contact with the wire just to know whether electricity runs through it. This device would determine whether there is some form of electricity running through the wire without you actually needing to touch it. Ensuring your overall safety. Waterproof and dustproof design of IP45 rating. Non-contact feature ensures a safer application. Equipped with convenient torch light. The LED torch allows operation even on dark corners.