TopTes Guard-863Pro 4 Gas Monitor Multi Gas Detector for H₂S, CO, LEL, and O₂, with TFT Color Screen, Upgraded O₂ Sensor (5-Year Lifespan), USB Data Export, 18h Battery Life, Reliable for Work & Home-Orange

The Guard-863Pro 4 gas monitor detects H₂S, CO, LEL, and O₂ with a 0.5-second response time and a vivid TFT display. It includes a 5-year lifespan oxygen sensor and a fast-charging battery.

• The description claims the device undergoes stringent safety testing by an international certification body.
• The description claims the continuous triple alarm system ensures immediate alerts.
• The description claims the TFT color display shows real-time gas data and trend curves.
• The description claims the device supports USB data export.