The Precision Medical AccuO2 Oxygen Analyzer is designed to analyze and measure a device’s oxygen purity. These features allow users to save on costs and time when checking a patient’s device. The analyzer is a compact handheld device is easy to transport, operate and store for the user’s convenience. The LCD screen display is easy to read, with fast results in a large, bold font that allows for a quicker setup time. Features: Lightweight Handheld or mountable Easy one touch calibration using medical air or oxygen 5,000+ hour operation using 2 AA batteries Dimensions (Device Only):Height: 4.0 in. (10.234 cm)Width: 2.90 in. (7.30 cm)Depth: 1.30. (3.32 cm) Weight:0.35 lbs. (5.60 ox / 0.15 kg) Mode of Operation:Continuous Warm-up Time:Not required Operating Temperature:50°F – 113°F (10°C – 45°C) Storage Temperature:5°F – 122°F (-15°C – 50°C) Application:Oxygen Analyzer