Stock Code: HY-M1
Large 4.23-inch easy-to-read E-ink display
Long-life, high-performance CO₂ sensor based on NIDR + photoacoustic technology (10-year lifespan)
Informative and detailed measurement display with Emoji Comfort Indicator
Visible 3-color LED air quality indicator (good, normal, poor)
Built-in 2500mAh rechargeable lithium-ion battery (lasts up to 14 days)
