Portable Oxygen Detector, Rechargeable O2 Monitor with Sound, Light, Vibration Alarms, Oxygen Air Quality Meter Measures Temperature & Humidity for Indoor Outdoor Use

【Fast Response & Accurate】Our oxygen monitor uses a high-precision electrochemical sensor for real-time 0.5 second oxygen gas detection from 0-30% range with +/-5% accuracy. Featuring 0.1% resolution, the O2 monitor enables accurate detection of low-level oxygen gas concentrations.
【Triple-Alert Protection】This oxygen meter features a triple-alarm system: sound, light, and vibration that automatically triggers when oxygen levels exceed the default 19.5%-23.5% threshold range, ensuring reliable warnings in all environments and enhanced safety.
【Rechargeable Battery & Long-Lasting Life】Portable O2 air quality monitor with a 2500mAh built-in battery, offering up to 16 hours of continuous operation and Type-C charging. Automatic stores up to 180 alarm logs for easy O2 gas monitoring and safety analysis.