The manufacturer of the Drager X-am 5100 H2O2 Hydrogen Peroxide Gas Monitoris Dräger. This Drager X-am 5100 H2O2 Hydrogen Peroxide Gas Monitor is in excellent cosmetic and tested working condition. Successfully detected hydogen peroxide vapor during testing and displayed on screen the PPM. The battery charger successfully charges the detectors internal battery. When powered on the detector goes through a quick start up process where the devices alarms are tested; flashing red lights, and an audible multi-tone alarm and vibration. All are shown to be working properly. The LCD screen illuminates making it easy to read. The two soft touch buttons are in excellent condition and work to control the functions of the device. Once on, the H2O2 Hydrogen Peroxide gas level test can easily be run. Results are displayed in the Parts Per Million measurement. The device is strong yet light weight making it easy to carry on your person using the heavy-duty belt clip or lanyard loop, and without fear of damaging it. A copy of the manual is included on CD. The product is located in Coolidge, AZ, USA.