GasDoc DS-399PRO 4-in-1 Portable CO & CO2 Detector — 72H Standby, Audible & Visual Alarm

GasDoc DS-399PRO: 4-in-1 air safety on the go

The GasDoc DS-399PRO is a compact, 4-in-1 detector designed to monitor carbon monoxide (CO) and carbon dioxide (CO2) levels while also tracking ambient temperature and humidity. Its palm-sized footprint makes it easy to carry—whether you’re at home, traveling, camping, or cruising in a car—so you can keep an eye on air quality without being tethered to a wall outlet.

What it measures

• CO range: 0 to 1000 PPM
• CO2 range: 400 to 5000 PPM
• Real-time temperature monitoring
• Real-time humidity data

Portability that fits your life

• Palmed-sized design: 4.13 x 2.05 x 0.94 inches for easy pocket carry
• Includes a lanyard for quick attachment to bags, belts, or backpacks
• Lightweight enough to tuck into a glove compartment, travel kit, or daypack

Alerts you can trust

• Customizable alarm thresholds for CO and CO2
• Audible alarm plus a ring indicator that changes color by alert level
• Two-tier notification helps you respond promptly in everyday scenarios

Power that keeps pace with your plans

• Rechargeable 1000mAh battery
• Type-C charging for quick power replenishment
• Up to 72 hours of continuous use on a full charge

What you get

• 1x DS-399PRO Carbon Monoxide & CO2 Detector
• 1x Type-C charging cable
• 1x Lanyard
• 1x User manual

Real-world moments with GasDoc DS-399PRO blend practicality with data you can act on. The device provides clear, actionable readings and a reliable alert system, helping you stay aware of air conditions during daily routines, road trips, or outdoor adventures. While it does not diagnose health conditions, its measurements offer a snapshot of your environment that you can factor into your decisions about space use, ventilation, and safety habits.