Wiha’s SB255-12 voltage detector is a practical, convenient and safe way to check for AC voltages between 230V and 1,000V. Contactless it detects voltage with proximity of 4mm, making this a safe method. A bright red LED indicates a voltage is present. It has a plastic housing with a practical pocket clip. The overall length is 149mm, weight only 39g. The SB255-12 includes 2 x AAA batteries. Standards: IEC 61010-1; measuring category: CAT III 1,000 VAC.