The Milwaukee® 10-1000 V 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 10-49 V 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 and Suppression Systems, HVAC Controls and Security and Access Controls, along with many others. The 10-1000 V Dual Range Voltage Detector not only detects, but also differentiates 10-49 V from the standard voltage range of 50-1000 V. It does so by using a uniquely colored LED indicators and audible tones, delivering the clearest indication of these two voltage ranges. A built-in LED work light allows for increased visibility in low-lit areas and automatic shut-off after 5 minutes helps preserve battery life. The 10-1000 V Dual Range Voltage Detector is a best-in-class voltage detection solution for any Electrician, HVAC Technician, or Facilities Maintenance Technician.