PROMOTE HEALTHIER INDOOR AIR QUALITY: Don't let air pollution affect your loved ones. With the compact CO2 Monitor you can manage indoor air quality efficiently, potentially preventing headaches, fatigue and lack of concentration. Whether or office, a healthier environment. ADVANCED 2-in-1 CARBON DIOXIDE MONITOR: Versatile CO2 detector that can assess CO2, TVOC levels in your space. It comes with a large capacity built-in 5V battery, easy to charge via USB. Save energy costs and take a step towards a world. PORTABLE & RECHARGEABLE: Our air quality monitor features a built-in 1000mAh rechargeable battery. Up to 8 hours of use per charge with low battery indication, it's easy to charge using the included USB cable. Remain vigilant about air quality anytime, anywhere. SMART & VIVID VISUAL ALARM SYSTEM: Clear, intuitive CO2 concentration status display with a colour-changing indicator according to CO2 levels. Reveals levels distinctly from green (good) to red (serious). Instant understanding, no complicated figures. VERSATILE USES INCLUDING BABY ROOOMS: Portable, easy to carry and efficient. Perfect for use in bedrooms, living rooms, baby's rooms, office spaces and more. Material: ABS colour: White Package Contents: 1 x detector 1 x lanyard 1 x charging cable Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.