Direct from the Manufacturer - USA eXact LEADQuick with Bluetooth Photometer #486900-BT CONTAINS 1 EXACT LEADQUICK W/BLUETOOTH PHOTOMETER, 1 CLEANING BRUSH, AND 1 INSTRUCTION MANUAL. The eXact LEADQuick smart photometer is the ideal portable tool for testing lead levels in water, paint, and more. New and improved Bluetooth photometer is designed to work with our eXact iDip app, allowing users to track, share and store results straight from their smart device. Lead is toxic to humans and can be ingested through water or other contaminated substances. The EPA and Congress continue to classify lead as a substance hazardous to the public health, and detrimental to normal childhood development. Widespread use of this simple, field test method will quickly and accurately determine exposure to toxic lead. The fast lead test solution, the eXact LEADQuick photometer gives accurate results using fewer steps than the competition. It's affordable and uses a non-technical procedure. Ideal for Lead in Water Screening 3 ppb (µg/L) or . 03 µg lead detection (EPA Max Limit is 15 ppb) Detects 1- 500 ppb Lead in Water. Uses patented technology (U. S. Patent 7333194).