The Milwaukee 10-1000V Dual Range Voltage Detector Is The First Non-Contact Voltage Detector With The Ability to Light Up, Detect, and Differentiate Automatically. The Expanded Sensitivity Range Of 10-49V Offers The Ability to Detect Voltage In Common Systems That Would Normally Go Undetected When Using A Standard Voltage Detector. These Systems Include: Led Lighting, Fire Detection & Suppression Systems, Hvac Controls, and Security & Access Controls, Along With Many Others. The 10-1000V Dual Range Voltage